STi is a great car, I used to own one. Don't buy the black '04 at Advant, BTW (it has a very long and grimm history).

I now own an S2000.

Best advice is to think about what you want in a car (RWD two-seater convertible, go-kart on wheels, or four doors, turbo+torque, AWD?) and to go out and drive them both.