tough choice....R33 or S15....hmmm....
if you can find a nice s15 for under $23 (wishful thinking), then i'd say go for it.
they are newer, look sexy as all hell, and have a much better stock turbo than the r33's. Respond reasonably well to mods, and the interior is much nicer.
Don't get me wrong, i drive a skyline, but if you could afford it, got the s15.
Just a much better looking car all round IMO.
But its up to you - drive both and see which one you like better
Good Luck