Ok, I get the 4-6 channel options over the 7-9 option ect...; however, I am not sure if I want to fly planes, helicopters, or both. If I purchase a helicopter controllable radio, like the futaba 6EXH-6, can I fly both planes and helicopters off of this one radio?

I am assuming if I can, all I would have to do is purchase the equipment such as the servo controller and servos etc... for my different models. Am I correct in my understanding of this?