As nice as monster stoppers are, and sometimes we need them for the extra weight in the right foot!
Just make sure u ask your transport auth., and insurer, if the fitment of Nissan brakes are legal, and be covered for insurance! Have been stung in the past with a highly modifed car, and know that these 2 large auth. will do anything to get out of a payment.
If your driving a VR-VS, get the HSV brakes from a VR-VS. In QLD, I can fit Walky brakes to my VL wagon, as they were same model. Plus it prevents the need for stuffing around with custom brackets, alignment of calipers and rotors.
Good Luck !!!