99s seem to be the 'best' year as far as options and how the car was put together as far as i can tell. a lot of people will argue different years, i feel they are all similar. i had a 98 and didnt really think it was any different besides a few things.

i would start with a GTP if you want to go turbo. you can run more boost that way since it has the lower compression block. however, buying a GT and a L67 bottom end could be cheaper.