I'm in a similar boat myself, with a 205awkw bugeye rexy, looking at trading up to the 05 STi or an R33/R34.
Here are a couple of things I've noticed, and wouldn't mind a response from some of the guys who have actually driven both cars:
1. Sound: I love the boxer rumble, what are the distinctive characteristics of a gtr at full noise (from the cabin?)
2. Street: I like the puntability (is that a word) of the rexy in the tighter street (or something like great ocean road) is the GTR as much 'fun' as the rex in these situations? How much 'bigger' does it feel as a car (i.e. does it feel commodore sized in carparks?)
3. Track: No question I'd prefer to punt the GTR around the track, but as far as stock boxes go, when do they start to break?
4. DCCD and new car feel/warranty: The 05 appeals to me in this sense, as its a brand new car with a nice interior, do the R34 interiors look dated now (in the flesh)??
5. Has anyone done any dirt work in their GTR? I don't mind motorkhanas...
Again, I think there is great respect for both cars, so not trying to start a flame war, but for the guys who's made the transition what was it like??
Cheers,
Ben.