RE: anything bad about the dx7?
The only thing "bad" about the DX-7 is the battery supplied with the radio... dont trust it!
There have been a few crashes at my local field by DX-7 owners.. just about every one of them was a battery issue.
If the voltage drops down enough, the reciever "resets" and it can take 4 or 5 seconds for it to sync up with the transmitter again...
which is way more than enough time for a tragedy!
Most of the guys at our field have taken to using either Lipos with a voltage regulator, or just going with a 5 cell 6 V pack.