The Optic 6 2.4Ghz (rather than the Optic 6 Sport, they really are two different radios) looks to be an outstanding value. The bundle with two receivers is especially attractive.

I flown with a friend's Optic 6 radio in the past. It's well designed from an ergonomic standpoint and feels great in your hands. It has a good selection of mixing and programming features for airplanes, gliders, and helicopters. The Optic 6 2.4Ghz transmitter can also be fitted with a 72Mhz RF deck so you can fly your old receivers with it as well as your new 2.4Ghz receivers.

The Optic 6 2.4Ghz radio would be a really smart purchase.