Hey, I don't see a C or a B class 2000GT but I sure did have a time tryin to keep up with one last night. I like my C-classer for hotlapping but its really slow off the line and take s a while to get going. I did as much grip upgrading as I could before deciding on the lesser of the Supra engine swaps. It seems a tad underpowered and I think it lies in the lack of trans tuning. Also mine is without Aero.
If your saving them as your lower class stealth cars thats fine. I think I have a c-class short track killer in my stable.