I can't give you an in depth look into pads like Gary can, but I run the Project MU HC+ pads on my 180, and am really happy with them. I get minimal fade in my setup, (F:S14 calipers, project MU rotors, braided lines, good fluid, R: stock calipers, braided lines, RDA rotors, DS2500 pads) and my rotors seem to be holding up very well also. A friend runs them in his R32 for track work as well, and he can't speak highly enough of them.
I've only run the 2500's on the rear of my car, and for 1 track day, so I can't comment on their performance.
Dane