Tommy kaira ZZII - Simlpy a great all around racer, even though it eats the front tires like a rancor. With R1s on the front and R2's on the back, this thing won me the Tokyo endurance by only 50 secs after 1 hr, 40 mins. I later plan to use it at the 'Ring 24 hrs
Amuse S2000 GT1 - Another great all-around car, won the Grand Valley endurance
with it.
Mine's Skyline - A blast to drive, although in stock form, it eats ALL the tires like a rancor. Still, it's an awesome car and one of the few AWD cars that don't have understeer problems.
Holden Monaro - Another fun car to thrash around, capable of high A-Spec point wins at the NA Sports Race.
FPV GT - Capable of 200 pts at El Capitan
FPV F6 Typhoon - With only a sports muffler and S3 tires, this won me the Turbo Sports Race.
Both Vipers - The GTS is actually a fun car to rally in and I even won some Hard rallies with it. The SRT10 can win the Super Car Festival stock, and can get some close races there as well.
Buick Special - Hard to drive because it slides a lot, but once you get the hang of it, you'll be racing cars you never thought you could race. I bought R3 tires for mine and won the All American Championship with it.