What Matt posted! I've run my SVT twice at Buttonwillow and once at Willow Springs with the stock rotors and have not warped them. I'm using Porterfield R4S pads and Motul 600 fluid and the brakes work very well.
Cross drilling is purely a cosmetic thing and actually makes your brakes less effective. Slotting does have some performance value but ONLY in racing situations.
FYI... On my racing 240Z I have my solid rotors cryo treated to improve their longevity. Cryo treating is good at improving the wear resistance of rotors, but it won't have any effect on warping.
FYI2... Most rotors get warped because of driving technique. It sounds funny, but if you warp your rotors on a race track, you're using your brakes too much!
