Buy a radio with as many channels as you can afford.  You really can't go wrong with Spektrum, Futaba, or JR.  Plenty of support, most people have them - if you have a question, and they have multiple receivers to choose from.  Personally I like Futaba.  If you can possibly afford it go with something that can be updated with a software download like the Futaba 8FG (what I would pick as it's actually a 14 channel radio) and to me by far the best bang for the buck.</p>