I always enjoy to push my peugeot 908 HDI FAP and Corvette ZR1 RM to MY max, haven`t reached the cars limit yet. And and i love the Ferarri 430 Scuderia fully modded, that car is a grip monster! Also i have a thing for F1, the Ferarri F2007 is amazing.
Tuned premium rx7 with sport soft tires. My favorite non-super car (I own an rx8) and it just amazes me how well it handles with the setup I have on it.