Just to give you a rough idea.
I went 19x8.5+15 (245/35)F 19x10+20(275/30)R
In my opinion I think the fitment is pretty sweet not aggressive but not too aggressive.
I figure I'll only need to roll my guards if I drop it too low.. (but I intend on rolling my rears as is when I drop it)
Got a pretty good price on the XXRs too.
Just over $1k without tyres.
or just save a bit more and get a 2nd hand set of 370z 19s, last I checked going price with tyres was just around the $2k mark...
Could be less now, check the zclub forums.