I've used the same set of rotors through out 2009. That includes VIR, CMP, and Roebling tracks, about 10 races worth. You can also get Carbotech 8s if you are worried about them being too aggressive.

I won't order anything until we get a complete count and I'll make notes here. Steve P, David S, and a few other Z guys use Carbotechs and I hope they can add to the count.