Most of us here have a shady love affair going with HobbyKing - they have a massive inventory and prices are good, and some things are stocked more locally than China so it doesn't always have to take a long time getting to your door. Prices are good in general, just watch that you don't sacrifice quality and safety to get a low price. Read the reviews, especially on complex things like ESCs, motors, radio gear, etc.
I have other favorite places to hit for parts and such... eBay and Amazon are sometimes great for certain things like props and motors, various cables and brackets and velcro and on and on.
I frequently shop RCTimer for motors and motor parts, they have a really nice selection so long as you have a good idea what you need.
I use Exceed RC "Rocket Series" motors on my EZ*, specifically the 2220-1880kv outrunner spinning an APC 7x5E. I fly low and fast FPV almost exclusively and this combo gives enormous performance - I can hit 50+mph with ease and go vertical for a bit if I need to think fast. A more sane and relaxed, very nice combo is the Exceed RC Rocket Series 2220-1500kv motor spinning the APC 7x4E or 7x5E - less aggressive and very efficient but still quite punchy if you want to see her scream a little. Note that these setup are outrunners with large props and will require a special mount to work right if you're on the EasyStar 1. EasyStar 2 is not my area of expertise, but I gather it's even easier to work it on those, or at least as easy. One little thing to note - the larger the propeller, the more efficiency you'll get and the quieter it will spin, but you have to use an appropriate motor. For instance, a 900kv motor matches nicely to a 10x4.7 slow fly prop, a 1200kv or 1300kv motor would pair nicely with an APC 8x4E, and an APC 6x4E goes well with 1800 - 2200kv motors. I even used to run a 2750kv screamer "Airfield RC" motor with a 6x3 prop, which was loud, obnoxious, very fast, and very inefficient. The EasyStar 1 goes best stock with 6" props at the biggest, but you can easily set it up with some addon hardware to do 8" props. I like the 7" APC props because they strike a nice compromise between efficiency, raw power, ease of balancing, and tail boom clearance. Its especially a joy to hear your EZ buzzing softly overhead instead of going "RAAAAAAARRRRRRR!!!!!" at WOT and everyone within half a mile searching the sky for the source of the noise, lol. I do like my power, ohhhh yeah... but 7" props get me that just fine without killing my flight times and waking the dead. Just remember, using a bigger prop likely means elevating the motor so that your prop tip won't strike and cut the tail boom. Also, bigger props generally need more power to spin them. My 1880KV motor will pull roughly 35A to spin my APC 7x5E at wide open throttle, so I use a large ESC to prevent a brown out, just in case I got a little too wild. 15A max is more than enough for any sane EasyStar, in fact mine will stay aloft at just 5 amps even with my heavy loadout. Choose your ESC, motor and prop combo carefully - the ESC to provide enough power to the motor to avoid brownouts, the prop to provide the kind of thrust and efficiency you would like, and the motor to spin it without burning up at wide open. The numbers I gave you above with KV and prop size will get you a good, beefy setup that allows good cruising and efficiency with lots of room for bursts of aggression. Less motor KV rating on each prop size will give you less max power but greater efficiency, while more KV will give greater aggressive performance but more likelyhood of burning something up, and less efficiency. Head for the middle if you like decent speed and decent efficiency, head toward the anemic if you prefer to soar and float, and head for... madness if you prefer madness. I like the middle ground, but everyone's different.
And of course HobbyPartz is great for a LOT of things in general, not just the motors. Also, one of my long time favorite places is HeadsUpRC:
I often shop for props there, prices are good... and with two quadcopters, an EasyStar and Trappy's old first Zephyr, I'm definitely a frequent prop-shopper.
For your amusement and possible learning, my EZ* presently consists of:
One EasyStar 1, built from replacement parts from eBay
One Exceed RC Rocket Series 2220-1880kv motor
One E-Max 60A brushless ESC (motor and prop combo pulls roughly 35A absolute maximum on a very fresh battery pack, so lots of headroom)
One APC Thin Electric 7x5E propeller
Two handmade ailerons with topside mounted servo hardware, specifically
engineered to aggravate those who know everything
Four HobbyKing 939 MG servos for the ailerons, elevator and rudder. Yes, I have an operational rudder, the ailerons slave off it so ailerons and rudder work together. The 939 MG analog servos are nice little units, tough enough and cheap.
Two clipped main wings (took 4" off the tips for 46" wingspan) with polyurethane overcoating and handmade locking setup
One DragonLink UHF long range radio control system good for ground scraping at very long distances
One DragonOSD unit for location, ground track velocity and battery status display while in flight, also records my entire flight GPS data to file for analysis and viewing in Google Earth
One Sunsky 1.2GHz wireless video system with homemade antennas on plane and ground station
One Zippy 3S 20C lithium polymer battery pack to run everything on the plane, one voltage programmable, dual buzzer low voltage alarm to warn me when I'm soon to tap out
Packing tape for strengthening and impact/friction protection on fuselage (important for repeated belly skid takeoffs and landings). One Winn Dixie card as a rudder enhancer. Velcro bits here and there for VTX attachment and canopy strapping.
Oh, almost forgot! One KT&C KPC-E700NUB camera on the FPV system, sitting on top of a 180 degree modified Hitec 5645MG servo for pan control. This setup works GREAT but eventually I'll swap out that ridiculously overly strong servo for something a little lighter. The camera is also not really my favorite - I prefer the KPC-DNR700, because it has Sense-Up and is an INCREDIBLE color camera in low light. This one works, and I do most of my flying in at least dusk or dawn light, so I'm dealing with it. I was sent it by a... nice gentleman... that insisted it was a better camera even though it wasn't what I ORDERED. I found out though that it was easily IR modified so I kept it and there it sits on my EZ*.
Oh x 2... For flight video recording I use an 808HD #16 cam modified with a larger, external LiPo cell (an 800mAH for 3x the runtime). It attaches to a tab of velcro atop the FPV camera turret, so it pans with my FPV view. They're great little recording cameras, very light, the video quality is good and the audio quality is excellent. They're a little easy to break, but the idea is NOT to crash in the first place so there you have that.
Have fun and welcome to the group! I learned most of what I now know from here and FPVLab, plus a LOT of trial and error. Don't be afraid to ask anything - most of the people here are very helpful and personable, probably more so than what you're getting at your field. And don't sweat the crashes... they'll turn from a feeling of being out of control of your plane to more of an "I got a little wild" sort of thing before you know it. Consider getting a simulator, and get out in the real world and fly every chance you get, and before you know it you'll be pushing your limits and realizing with no small amount of surprise that you got pretty good at it somehow. Above all, HAVE FUN. Hobby RC is such a blast... really, truly fulfilling and entertaining. Don't let ANYONE reduce it to something too serious for you to enjoy. Don't be afraid to tell the bossy, know it all types that perhaps they should seek counselling for thier OCD issues. ;-)
PS: Forgot to mention my radio! It's a used Futaba 72MHz T7CAP I bought on eBay, and I modified it to give a PPM signal output via a servo lead cable and connector so that I can use it with my DragonLink and FRSky setups as needed. I left the 72MHz RF circuitry intact so all I have to do is put the crystal back in and presto, I'm on 72MHz as well if I ever need to be. It's a nice radio, not a thing wrong with it and it never lets me down. I run it with a 2500mAH 3S lithium polymer transmitter pack and never have had any problems with it. My only wish is that it had more channels, because I found a way to use all 7 up pretty easily, lol. I still love my T7CAP, use it for everything from my Traxxas Stampede to my two quads, the Zephyr, the EZ and the weird little Dora crawler 'bot. I even used it for an RC boat before I decided that FPV boating was the most boring thing since Gene's sense of humor. :-)