Hi all, I am looking for a used sports car. It wont be my first I have a 3000gt and now I am looking for something else.

I have basically narrowed it down to these manufactures

Chevy- 2002-2003 Z06 corvette drove a 02 and loved it. No back seat though..
BMW- I know some one will say BMW and its out of the question.
Pontiac- 2004 GTO I got to drive one of these and be the passenger it was nice comfy and had a back seat with a decent engine.
Porsche- I drove a 02 boxster and when ever I was on a turn I felt like the car was just readdy to slip right out from under me… It was nice though eh iffy.
Ford- I got to drive a ford GT I liked it allot not nearly as much power as the Z06 but it was nice flashy good looking.

So am I leaving out any real cars I should look at? Also would be cool to see your thoughts on the cars I am considering. Thank you all in head of time.

~ G