By the victoria power to weight ratio law, an r32 gtr (all gtr's actually) are over the power to weight ratio... Therefore no matter what your doing, if your driving, then your illegal. There is a shitload of people on here that have r33gtst's on their P's (also illegal) many of them get away with it, many of them don't.. It usually comes down to the area that you are driving in at the time. If you end up buying a GTR and driving it on your P's and you dicked for power/weight then don't whinge.
Also don't forget that there will ALWAYS be someone who has a faster/better car than yours. To me, buying a GTR so that you can having something cooler and faster than your friends is silly.
whatever you do, good luck (especially with importing)