they already have been legalized. Motorex is out, and it looks like RB Motoring wont be able to legalize them and take over for Motorex as they originally thought.
People like the GTR because of its power potential and because of its AWD system. Kinda like how everyone likes supra's for the 2JZ, but this car can hook up the power.
As far as people liking the GTS-T's, I think that is retarded. I would much rather have a Z32 than a GTS skyline.