I agree with the 98'-02' cause if yur drunk and squint really hard....you'll have a GTO....LOL...:th_laugh-spit::th_drunk1:
In my opinion, looks wise, 97-03 Coupe, because the 04+ are ugly as hell, the GXP looks decent with the big wheels and such, but unless you like the 97-03 with the plastic valve covers, plastic intake manifolds, and plastic gaskets, and transmissions that are made of rubberbands, the 04+ seem more durable.
But like others have said, depends on the situation...reliability, aftermarket availibility, etc.
Model year 2000. Last year for automatic climate control and performance shift button. I've got auto climate on my GT and miss it on my GTP.