OK there are 2 main types of hyper 7. One with pivot ball suspension (PBS and PCR) and the others have C-hub (TQ sport, TQ pro etc).
The PCR is the Paul Coleman Racing version of thge PBS so has a laydown steering servo and probably some other minor differences. The TQ sport is the basic hyper model whilst the TQ pro has lots of lightened and CNC'd produced parts on it and I think (but check this out) comes with the 8 port engine.
In general PBS models are more adjustable whilst C-hub models steer better. So make you choice from that.
My money would be on the TQ pro but if your strapped for cash you can get the TQ sport and any of the pro bits will go straight on.
Thats just my opinion!