For those who like the quadcopters, but do not want to assemble it.
I think the RTF version is the best choice.
Such as the Walkera UFO MX400 Quadcopter RTF W/Devo radios and aluminium cases at http://www.hobby-wing.com/walkera-uf...evo8s-rtf.html.

Product Description
Features:
1). Bi-direction transmitting technology,GPS function applied.
2). Upgrade online Radio and Bi-direction controller convenient service.
3). The newest 6-axis control technology makes the super stable flight
4). Cool flashlight demonstrate unique fascination
5). Unique scaling ladder simulation skid landing

Specification:
1).Length.width.height: 732x732x190 mm
2).weight:1050g
3).load:500g
4).Brushless motor: WK-WS-28-009 x 4
5).Gyro: 6-Axis control system

This package includes :
(1)Pre-assembled UFO MX400 (No Battery included, requires 11.1V Battery to work)
(2)12 X LED Light Strips for decoration
(3)1 X Aluminum Protection Case
(4)Walkera DEVO series radio selectable

Optional accessories
(1)11.1v lipo battery pack;
(2)Walkera Sensor WK-CTL01-D
(3)Carema Set
(4)Carema Mount Set

T-rex 450 Plus super combo is available now.
http://www.hobby-wing.com/t-rex-450-...kx015083-.html

The specifications is as follows:
Length: 634mm
Height: 224mm
Main Blade Length: 325mm
Main Rotor Diameter: 715mm
Tail Rotor Diameter: 158mm
Motor Drive Gear: 11T
Main Drive Gear: 121T
Autorotation Tail Drive Gear: 106T
Tail Drive Gear: 25T
Drive Gear Ratio: 1:11:4.24
Weight(With Motor): 633g

Accessories:
T-REX 450 Plus Kits Set X1 set
ALIGN T6 6Channel Transmitter X1
ALIGN R6GF 6 Channel Receiver X1
3S1P 11.1V 2200 mAh/30C Li-polymer Battery X1(optional)
Lithlum Battery Balance Charger RCC-3SX X1 set
325D PRO Carbon Fiber Blades X1 set
450MX Brushless Motor(3400KV) X1
GP790 Head Lock Gyro X1
DS415M Digital servo X3
DS425M Digital servo X1
RCE-BL35P 35A Brushless ESC X1