If you're going to bother getting a 6 channel radio, I recommend skipping the analog sets, and get a computer radio. Here are a few options:

Futaba 6EXA
JR XP6102
Airtronics RD6000
Hitec Optic 6 (not yet available, but promising)

I don't really think you can go wrong with any of those. [link=http://www.servocity.com]Servo City[/link] is likely to have the best price on hitec and futaba stuff, and you would need to find a horizon hobby dealer (or order direct) for the jr and airtronics.