also something worth considering is the condition of the drivetrain as this is also one of the fundamentals of the car that makes it great. people often forget that the 4wd system not just the engine is what made the 32 GTR so damn unbeatable even by today's standards. and given the age of these cars the rear diffs, transfer case and front diff could be a little worn from spirited driving. you also have to be quite pragmatic when it comes to selection because most GTR owners don't mind giving it the beans when they come out of a corner and there are no cars or po po in sight. anyone that argues different is a charlatan and doesn't deserve one!
but there's nothing more annoying than having a GTR with niggling drive train issues. IMO i think that lightly tuned engines make good usable power and are quite resilient and trouble free provided that they are regularly serviced with good oils and correct viscoscity. make sure the engine oil is clean and the coolants are nice and fluro green. but the fellas are quite right about the stock turbos. they will definitely need to go.
i've never had any major engine problems in the four years i've owned my 32 gtr but i'm starting to get drive train problems. i've replaced the bushes in the rear sub frame and diff because they've never been replaced since production! and i'm in the process of replacing all the front ends and all with nismo bushes (although i'm starting to regret the nismo diff bushes because they are waaay hard and now the diff clunks because there's no give!) and then there's the diffs, the synchros, and front diff and i think it's only going to get worse before it gets better. and if you smell something that smells like burnt hair after driving it with a bit of vigour, you can pretty much get ready to throw that transfer case out. or sell your first born to have it rebuilt. but meh, it is what it is and she is a demanding mistress that is totally unsympathetic to your finances. i've spent more on chassis than i have on engine but i think the rewards are greater if not more satisfying. i just think putting more power through worn and fatigued parts is just going to make things worse.
get some decent coilovers with good tyres, bigger discs and good pads are just as effective as brembos IMO if your calipers are in good condition (braided lines also make a world of difference) plus struts and braces and you won't be able to wipe that stupid shit eating grin off your face when you take it through the twisties.
hope you find the right one or the right one finds you and get ready to compile a list of organs you think you can live without in case you need to sell some to placate the i-need-more-power gods. owning a 32 GTR is quite an undertaking that requires commitment and the patience of a monk and it's an emotional roller coaster not for the faint hearted. but damn if it doesn't give you a tickle in your pants everytime you mash the loud pedal and hang on as that RB26 obliterates time and space.
GOOD LUCK mate and post pics when you've found The One.