Stock vs atock the RX7 will kill you on the track and in the speed area. They are killer cars. I have videos of RX7s killing skylines, ITR's, and a GTO. They are very well designed cars. But as for which one to get i would get the ITR i fi was not very mechanicly inclined and knew alot of information on the rotary motor.

Ive benn looking to get an RX7 for the past few months. I work in a shop that specializes in 7s and its quite suprising how little people know about the engine. If you would rather have a day to day driver get the ITR. It will be much more reliable for you, has great potential, looks awsome, and can handle great.

Good luck with your choice, and it you have any questions about RX7's dont hesitate to ask.