Pontiac was so awesome it went away. My pops had a 65 or 66 GTO with a six pack and as a family we owned a few Pontiacs in the 90's.
How about these G8 GXP Manuals?
https://m.autotrader.com/cars-for-sa...5D%5D%5B%5D%5D
Sounds like you need an older M5, maybe the Chevy SS, or forego the 4-doors and get a 2004 Z06. Still the performance bargain of all time. I had one and it was a beast.