I stayed away from the GP because of the auto and large size, but the current prices and 32mpg I got in my 97 are really hard to pass up. My thoughts on mods were

OKGPC shift kit
SD headers, downpipe, u-bend delete, back to stock mufflers
wideband
MP3 Player
Water meth if the mood strikes
and (flame suit on) a tune for 87

I know everyone will tell me to go N/A, but it's a better base if I want to go deeper into mods.

Anyone have thoughts on 97-2003 or 2004-up?