I bought a Futaba 6DA. It works and isn't bad, but I wish I'd spent $5 more and gotten a computer radio.

The 6DA has very limited mixing. Can't do elevons. (needed for most flying wings such as the Zagi)

Either get a low end 4 Channel (the airborne flight pack and batteries are worth the cost of the system... TX is essentially free by that mode of thinking.) Or get at least a Hitech Flash 5. anything in between... kind of a waste of time trying to get a few minimal extra features which may not be what you need in a very short time.