I'm quite happy with my various HPI RTR radios. I did buy a Futaba 2PL once, but was disspointed with the range.
The Futaba 3PM 2.4 GHz version is the one I'd like, and is strongly recommended by the 5B crowd:
http://www3.towerhobbies.com/cgi-bin...&I=LXXRL8&P=ML
The only thing I don't like is the internal Fail-Safe. You can set the radio to one of two modes depending on whether you use analog or digital servos. If you're using analog servos, the Fail-Safe has to be manually actuated each time you turn the radio on. With digital servos, the radio mode used automatically engages the Fail-Safe.
The radio also has ABS braking, which is sort of fun to play with if you're using it with on-road cars. Never tried with it Off-road.