mate bought a pair of OBX carerra's.. they are pretty crap, but you get what you pay for i guess ($700 pair)
you will most likely need your rails modified to suit the seats, if their going in your GTR id keep the R seats as they are a hell of alot better. The TX3 seats.. id probably go the OBX.
to fit them you will need the rails modified or have to buy aftermarket rails, i have some bride rails in my car for my recaro's, if you do purchase some seats your welcome to try them to see if the seat fits before going out and buying the rails. they are around 150 each from memory.
where abouts in perth are you located? i use to own a modified black KE TX3 and ive only seen 2 blue tx3 4wd's around, one around thornlie/gosnells (my hood) and the other was in perth.
Shaun
Shaun