FWIW, I sold an S2000 in preparation to get a GTO. Like Jason and his Z06, I sort of got tired of the S2000. It was probably one of the most fun cars I've ever driven, but it was way too impractical. I have a wife and 2 kids, so a 2 seater is just too restrictive. The only reason I got it in the first place was that I also kept my pick-up, and I found myself driving the pick-up far more often than I thought I would. Also, the stiffness of the ride and the tight ****pit made the car not very comfortable in regular day-to-day traffic. I suspect that these were the same sorts of reasons why Jason got rid of is Z06.
One more thing. My kids test sat the rear seats of a GTO at the autoshow and said that they are more comfortable than the ones in my wife's Bonneville -- although I have to admit they didn't really pay attention to how much harder they were to get in and out of.
Now if I can just figure out how to get my new fun car here more quickly.