Trainers
There is something about getting a computer radio for your first radio that bothers me...
When you have a computer radio with your first airplane, it usually keeps you from setting everything up the way they should be mechanically. With a standard 4 channel radio you have to learn how it all works and set it up without all those features on the 'puter radio.
If you go with the computer radio, I highly recommend that you set up all the control linkages without touching the EPA, CNT, or D/R or anything else on the radio. You will know what that stuff is once you get your radio...
The only reason I recommend a 6 channel computer radio(Airtronics RD6000, Futaba 6XAS, Futaba 6EXA, or a JR) now is because almost everyone ends up with one a little way down the road. Most decide they would have been better off with one in the beginning...