The DX6i is a computer radio, which means more programability, and the ability to have multiple model settings, so you don't have to change things in the radio for it to work with different planes. Get it now, so you don't have to buy another radio. It's $200 without servos or receiver, but you're going to have to buy a receiver anyways.

Radio:
http://www.horizonhobby.com/Products...ProdID=SPM6600

Receiver:
http://www.horizonhobby.com/Products...dID=SPMAR6100E