Check this link which has a lot of brake info:
I know some of the old school guys say solid rotors only but Racing Brake's rotors are designed with the particular type of slot that doesn't have this cracking problem. They also run about 150° cooler than comparable rotors, as well as being about 6 lbs lighter than the factory solid rotors. They have several levels of excellent track pads depending on your braking style.
They aren't the cheapest option out there but you get what you pay for and they are especially good for road course use.