don't get a 300zx! hold our for the r33 - they are far superior! the 300zx's are cops of cars - heavy, weak engines, hard to work on (have u seen the engine bay??) not to mention lack of seating in the rear (even in the 2+2) i know they're cheaper and more power, but you'll have way more mechanical problems with it and the power only makes up for the weight.
seriously the 33 is a great car i haven't had a problem with mine in a year and a half - but if u really want a 300zx, wait til 1st jan next yr and get an '89 for like $7.5k - check out www.prestigemotorsport.com.au and go to stock. (not affiliated)