I have had the MCX2 for about a year and have pretty much mastered it with the advance swashplate settings. I want to move onto a 4ch FP heli, preferably one that I can change out the fuselage/canopy on. There are just too many choices and I do not know which one is for me and I definitely do not want a 3d heli. Any resposes are appreciated.

I'd recommend the blade MSR or SR120 as your next step........Why?
Well as fixed pitch, single rotor helis, either of these are perfect for your continuing quest to master helicopter flying! (Hmm, maybe I should be in sales!)
Seriously, both these helis are perfect for what you need. Personally I'd go for the 120....Why? ( always with the questions!)
It's slightly bigger, but has the same control set and habits, it's very easy to fly, still fixed pitch, but, can handle wind (well, a slight breeze) better than it's smaller, lighter cousin. Also, if the weather is bad, either can be flown indoors ( A big plus at the moment here in the UK!)
I fly my MSR regularly in my lounge. No wind, hover and movement practice is easy, just right for building up 'muscle memory!'
It's a perfect 'move on' from co-axial helis.
I'm sure many others will have their own personal favourite to suggest.
I do not own an SR120, I have a Blade MSR. I have flown my friends 120, and got to admit, I'm jealous (Hi stephan!)
And, Whilst I do love My MSR ( Great learning tool, and great fun!), I wish I'd got an SR120, which to all intents and purposes, is the same heli, but bigger.
Yes, it is expensive, compared to the WL toys v911 or others which may crop up, but, if you are serious about progression in this hobby, my personal vote Is for either of these.
Hope this helps.
Chris.

Agree with toffa.

If you like the MCX2, then budget for a DX6i and 120SR.

Greetings from Maryland! Thanks for the advice and giving reasons why I should choose them and I agree...drop your current job and go into marketing.

Sorry I did not mention it, but I think I am going to buy the 120.

I concur. Definitely would get the 120SR for your purposes. You can swap out canopy covers, fuselage, mod to CNC parts....etc. The only reason i'm not doing it is because I've gone thorough 2 9958's and my current v911 (which I love to fly outdoors). My next step is a 130X and a SIM - time to learn CP

mSR X might be good
or a sim