Well...If I'm just going in cold on an unfamiliar track, the Aston and the Vette. On the right track and tires, the GT-R, because I like steering with the rear, and hate a car that pushes on-throttle, but after reading this thread, I think I need to drive the Ferarri a bit more. I usually pass it by since it can be high strung, and doesn't like curbs if I remember right, but I do like a car that tightens it's line under hard accel.