I started the hobby with the basic four channel set up and still use the radio. You can't go wrong with a good basic system and you'll always have another plane to put it in.

I also have a system with computer and mixing - an Airtronics Radiant. I'm happy with it but I find I don't use the mixing. Huber is right - mixing etc tends to make me lazy and I enjoy flying the plane stick and rudder. If the plane tends to yaw with aileron input, I like to put my own rudder correction into it rather than let the radio do it. The only time I use it is when my left arm gets tired and I want to fly with right only while I rest. But when the maneuvers start, I'm using both sticks.

Roodester