If you want to use RC control (like me, I dont like the idea of having a robot do ALL of the thinking
), you might want to invest in a nice radio with lots of channels. If you get a good one to start, you can keep on using it for years to come on all of your robot projects, and maybe get into RC for fun
If you can spend the cash for a transmitter/reciever, I would look into the Futaba 10c 2.4ghz system. It uses 2.4ghz so you wont get any frequency issues with other transmitters. Also the 10c has 10 channels, which should be enough for anything you will use in the future. The 12-14 channel radios run more than $1200, while the 10c is $600. A good deal IMO for a 10 channel radio. But the best feature is that it has 3 knobs and 2 slider switches, more than any other radios in its class. Lower channel (7 and under) only have the gimbals and some 2 or 3 position switches.
Right now I am using a Spektrum DX7 2.4ghz radio, it has 7 channels and is $300, but no slider or knob switches. In a year or two I will probably upgrade to the 10c, but I would have much rather gotten the 10c from the beginning.