First of all search for answers, a lot of your questions you will find have been answered, 93 onwards have less issues with the oil pump due to the front of the crank being a better design. As stated above, AFM's, Coils, Exhaust cam.. Then there is the big stuff that cars of this age might need.. Clutch with labor (may as well rebuild the box too)- thousands, Turbos-thousands, spin a big end- THOUSANDS...
I bought mine because all I wanted was to own an R32 V-SpecII, I will never sell it, and I have had to make sacrifices to do it. All I have had to do so far is turbos (on the big $$ list) the things to think about are:
How often will you drive (often- get a 33 Gtst, very rarely- Maybe get a 32 R)
How much mechanical knowledge do you have?
How long do you want to keep it?
Are you happy to have car that consumes money, but very rarely sees the light of day..
Having said all that, I am taking mine to Wakefield this weekend, and cannot wait, everytime I drive it I get a buzz, I love looking out my kitchen window and seeing it.
Insurance wise mine is with Shannons, limited use, agreed value of $25k,the mods listed I am 29 with an all but perfect driving record, and is $1500ish.