I was in the same boat as you mate.
I ended up getting a 33 GTR for a couple reasons....
1. For around $20,000 less i got a 33 with a fully forged and rebuilt engine. plus a whole list of extras. over a 34 which would have been stock.
2. last GTR i had i ran a bearing in it. $10,000 for a rebuild. so the 33 i have has a forged engine, plus if it happned in the standard 34 i would have been trying to find cash.
3. saved $20,000 to tidy up and do a couple more mods on the 33.
4. to me driving they both felt pretty much the same. But i do prefer the 34 to look at.
5. 34s seem to be coming down in price in a hell of a hurry (same as what happened to 32s and 33s before they leveled off in price), more then 33s are right now. as they will drop to a point and stay stable while 34s still drop a bit. so buy a 33 save your cash and in two years should be better off....
But really at the end of the day i preffered driving a more modifed 33 GTR for $20000 less then the standard 34s i was looking at.