I'm using the stock Brembo calipers but replaced the rotors with 2-piece rotors from RacingBrake and I'm using their ET500 pads. The combo has great stopping power and the rotors do a fabulous job of keeping the heat down. They also have the benefit of being about 6 lbs lighter each than the stock rotors. Reducing 24 lbs of unsprung rotational weight has all kinds of benefits. And they look good too.
You can see some pics and info here:
http://www.camaro5.com/forums/showth...t=45165&page=4