hi
1st i think u will need an international licence to drive here.
2nd ur insurance depends on ur driving history and because it will be an international licence i dont think they will put u that high up ibn the ratings ladder (prob 6 rating or something ) , it also depends on where u actually live as well.
it will obviously be more expensive to insure an r34 than an r33
for example
my r34 costs me 1800 a year
my s14 before that cost me 3800 a year (i obviously did not insure that one lol)
and my 32 gtr before that cost me 2300 (i was still on my p's when i had that though)
btw i have lost my licence 5 times and im under 25 so i do get looked down upon a little by the insurance companys