If you go GTR brembo, dont use DBA4000 rotors as they crack under track punishment. DBA5000s seem to be ok. If it were me i'd use G4 kits tho.
You havent mentioned tyres.... if you're really serious you'll get two sets of rims - one with R spec tyres for the track, the other with street tyres for, uh, the street...
If you dont want to run two sets of rims, go for something track friendly like Falken RT-615s or Federal 595RS (not 595 aka 595SS).