Theres nothing wrong with an N/A in todays world... especially with the way gas prices are going... The low end torque is fun to play with, but it does lack severly in the top end for me... but its an N/A... i never thought an I6 engine would go to 6000... its so much fun. But defintaley do the maintence, powder coat and ceramic coat engine parts, if you want some BLING under the hood a koyo radiator (or other aluminum radiator) and some slim fans add that extra cool factor, plus it frees up horse power.
Intake w/ metal piping, could extend into the fender well.
OBX headers or some other company
935motorsports 2.5 cat back w/ no cat and a muffler you want.
Could port and polish the head. Even a set of 264 cams would defintaley help all through the powerband NA or Turbo.
Adjustable Cam gears to get even MORE from the cams.
Show: Rims. Lowered, if you want a slammed look, tokico (sp?) with a set of H&R springs make it LOW, but it handles.
A turbo wing always add that extra show look, and a lip is good. Maybe the rear little flare things, i think there abfplug? or something like that, i know suprasport.com sells them, you can either get an Pre 89 wing, 89+ wing, or a whale tail, or a carbon fiber style wing... evo wing, sti wing, but that might also be a little custom...
But it all comes down to how much money you want to spend. Parts like carbon fiber hoods are functional and look good. So just take your pick on what YOU like for YOUR car.