Man am I ever late for this thread... I just bought an '09 G8 GT. I got rid of my '01 Grand Prix GTP. The underbody was starting to rust out (apparent when I'd open the rear doors and looked at the sills...) It was 60 miles away from rolling over 200K miles, and I lost 4th gear. I couldn't justify sinking another dime into it.
This G8 hauls ass! I feel like a 45 year old teenager. First V8 car I've owned since my '76 Firebird back in '89.