GTRs are a blast to drive when you don't own them but are getting old and very expensive!
On the flip side, now I've driven an R32 with an RB25 incerted, it also was an absolute blast with well sorted suspension and brakes i'd have it any day over a GTR! But it comes down to preference = YOURS.
So I say, Drive both and make your own mind up. I'm sure someone on these forums would be willing to take you for a spin sometime!