my vote would be to go for a s2 r33.
spend up to 18k on a decent mainly unmodded car, and remember you will need to budget for insurance/change in ownership etc.
if this is your first turbo car don't jump in the deep end and get a 32 gtr, possibly the worst thing you could do. even if the gtr is in top nick it will still require a great deal of maintenance to keep it that way.
having said that, any jap import you buy will not just be a get in, drive and forget about proposition. if you want that buy a new corolla
get the gtst, read a lot on here, and you will be happy with the decision.