Vette FTW! I think a modern bike could really harass the GT-R but not on a sandy mountain pass. The GT-R has 2 forms of traction/stability control and the auto rev match downshift technology...Tough for a biker to emulate.
That said I would rather buy the 10 motorcycles i could buy with what one GT-R costs. Or maybe just 4 and blow the rest on track days and strippers...