RE: 6EXA or the 7CAF??!?!
The 7C gives you more bang for the buck. Although you might not need all it can do now, in the long run it is a better value. Also, go for the digital servos. There arent that much more if you buy them with the radio but the difference between the standard and digital servos is about $25 a piece. So you get a lot more for your money going that way.