Originally Posted by Ruff

Wow, way to be a want-to-be elitist a-hole with zero knowledge about me. Who's to say I haven't done any on the track activities? I'm more into competitive motorsports, while I currently lack the funds to turn a 370z into a dedicated race car (and I know you do to by your directly quoted question), who's to say I haven't done other forms of racing besides autoxing?

To answer your original question, buy a cheapy set of 17's or 18's ( I see plenty in the 20 lb range at a decent price at an ample width to properly fit a wide tire on tirerack) and enjoy your track days.