Drilled or slotted rotors will chew through pads faster, and any performance improvement is sketchy at best. My opinion is that the best performance is found with blank rotors and high performance pads.
That said, I have run the cheap drilled rotors with Axxis Ultimate pads before, and had great braking performance and no warping or cracking issues. As said above though, pads wore out much faster, and the rotors cannot be turned once they are grooved. It looked nice, but I'll stick with OEM rotors from here.