If you are doing calipers and rotors, it won't make a difference dust...
Z33/V35/G35 BRAKES WILL FIT ON YOUR NM35 VQ25DET POWERED STAGEA!
IT IS ONLY THE BRAKE LINES THAT MAY BE DIFFERENT.
Honestly mate, I understand your concerns, but I don't know how else to tell you.
Axis, ARX, RX, RS, AWD, RWD, VQ25det, VQ30, VQ25, VQ35, HICAS, Non-HICAS, 5-speed, 4-speed... it doesn't matter.
If the brakes bolt on to a Z33, V35 or G35, they will bolt onto our Stagea.
Maybe read this thread from the start... or search the Stagea forum for brake info (if you did, you would have found this thread of Danny's Z33 Brembo conversion)
http://www.skylinesaustralia.com/forums/topic/288150-m35-brembo-brake-coversion/page__hl__350z+brembo
We are here to help with your questions, but if you don't want to listen to advice from guys that have been driving and modifying these cars for the past 4 years or so..... then I don't know what to tell ya.