Good thread, I was wondering the same thing just the other day.
I'm suprised the TX is on the top of the list, but makes sense...and I guess makes it cheaper to have as far as one time cost on way to a TRex...heh.

Being a relative newbie I wasn't aware of features like Expo ro Dual Rates. The first sounds pretty nice... What is the real point of dual rates tho? Doesn't changing idle-up basically do that anyhow?