Agreed, the Hitec radio is great if you are on a budget, but if you have more to spend, you need something like the Airtonics M8, flat out the most comfortable radio I have held, comes with more options than you have time to play with, and it has a 10 model memory.
As for servos, I have heard nothing but good things about the KO digital, it is what I would get if I bought another servo. I have owned Hitec servos and like somebody else here stated, I didn't have great luck with them, although the customer service is great, (they sent me a new one free.)
Speed control, here I dont think you can go wrong with any of the top company's high end models. Keep in mind that certain ESC's are actually the same, such as the Futaba and the Quantum, while the Quantum is cheaper.