I bought a 6ch computer radio (Futaba 6XAS) as my standard radio for my trainer. I set it up as a basic 4ch system but DID program exponential rates on aileron, elevator and rudder. I also had to reverse channels 2,3 and 4 (elevator, throttle and rudder).

As long as you don't go overboard with the programming, mixes and other settings, a computer radio is perfectly fine. Biggest advantage with mine is I can store all the trim settings for my trainer and not worry about having to reset everything when moving to a 2nd model.