I would go for the GTP and forget the GT, the Tranny is hardier and the little extra power when you want it. With the GT, the only way for the extra power is upgrades. Just saying... I had my first GP and wanted the GTP when I got that one (I purchased a 2001 GP in 2003). I regretted not having the GTP until I just got a 2000 GTP a few months ago. All I keep thinking is all the fun I missed those years without it. I love the GP's they're a pretty good vehicle if you get a clean one and take good care of it. The fuel economy is not really relative, will be close GTP/GT unless you are 100% NYC driving, then I would say the GTP is a disadvantage, just my opinion.
Good luck in your search!
