Last time I did a major brake overhaul 4 years ago, I picked up a set of Brembo stock replacement rotors for all 4 wheels via Tirerack.com. Been very happy with them. No warping, and very minimal wear to date despite lots of hard driving and 4 trips to DGRR. I've paired these up with Hawk HPS pads. Here's a link to the front rotors:
http://www.tirerack.com/brakes/brake...9&autoModClar=
Apparently Tirerack no longer carries the rear rotors, and the price went up about $10/rotor since I purchased, but you should be able to find the rears elsewhere.