Keep running costs in mind. It's one thing to be able to afford to buy a GTR, it's another to be able to afford to service it/repair it when it breaks. Like the others have said, consider the R32 GTS-t.
As for having an 'exclusive' car... most non-skyline enthusiasts will have no idea what the differences between a '94 V-Spec is to an '89 GTR. In fact most of them will be hard pressed to tell you the difference between a GTR and a GTS-t. At the end of the day, you want a car that YOU are happy with, it's not about other people. I mean, I'm one of those '40,000 R33 Skyline' owners and i'm damn proud!