Carbon metallic is preffered over carbon-kevlar, which in turn is prefered over ceramic, at least if you are going to be doing drivers schools on a race track.
The "ceramic" pads were developed because too many people complained about how dusty carbon metallic pads are, and how squeaky carbon-kevlar pads are.
Look for pads that are "FF" rated on their edges, thats what you need if you want to be able to haul it down from 70+ mph with confidence and repeatability.
My $0.02, with a couple of dgrees in materials eng.
John H.