Tannerlb's answer was pretty concise. I'm not sure if your budget will allow for a six channel comuter radio but if it does, go for it. I personally use a JR XP662 (my second radio) and I love it.

The question arises, however, if you're just in the thinking stage, why would you spend the long dollar for a computer radio? If you're worried about buying an electric starter ($20) How would you justify $200+ for a computer radio? I had the same feelings when I got into it and I bought a basic JR F400 for around $140, still flying the same trainer with it. And, if your like most flyers, you're going to be spending a lot of time with your trainer. My advice is to worry about a six channel radio further down the road. Maybe with your second plane. Consider one of the package deals offered by the catalogs. (Ultimate combos, they call them.) they offer the most bang for the short buck.

Remember, advice is free and mine is just another opinion! Best of luck to you!