if you want to fly a 3 channel plane great, but you will be better off getting at least a 4ch radio, doesn't matter what direction you are going for power,glow or electric, either way you power your plane the more channels you have the more options.
as you advance your going to have to get another radio sooner than later, there are alot of great packages with all included parts, or you can always piece your package together, if you have all ready been sucessfully been flying the small electric planes get a plane with ailerons and skip the 3 channel step.