I think all the pads you have mentioned are still street pads. What does that mean? Well, street pads have a high coefficient of friction at a wide range of temperatures. So,when it's -10 out and you start you car and drive down the street the pads will give you the same "bite" as they do when it's 80 out. Race pads don't work well for the street because their friction coefficient is very low at ambient temperatures. That means until you brakes are heated up they won't stop very well. Not an ideal sitiuation for the street. You get into your car head out, hit the brakes and the car does not start to slow down for another 30 feet. Plus they eat rotors. I know you can get custom pads made. To do this you'll needs some old pads that can be cleaned off so you can use the backing plate again. This is something you might want to look into.
Lastly, even the best pads and rotors will fade if used very heavily for an extended amount of time.
Concerning you crossdrilled rotors warping after two events I bet you just had some pad build up on the rotor surface. It takes very little build up for you brakes to feel like they are warped. I could be wrong but it would not surprise me if that was it.
I hope these ideas help out.
Got any pics of your brake ducts?
