"Still, if you want a better brake set up look seriously at the Alcon 6 piston BBK. It is superior in it's design and will cost you 1/4th the cc set up. It's the same kit I run on my wife's S4 and I can tell you I can (as can she) stand the car on it's nose with consistent fade free stops all weekend long"
My stock rotors after two track events were toast. So if you are going to track it at all this mod (meaning brakes in general) is a good idea. The alcon kit, imho is solid and does exactly what I need it for: City street driving and one or two track events a year. City driving is hard on brakes to begin with, but nothing like a two-day track event is on brakes.
The ceramics are expensive and will lighten unsprung weight a slight amount. Perhaps they offer slightly more fade free stopping power, but for the price the 370mm kit is exactly what I need for my use.

'03 Daytona Gray RS6
'06 Volvo XC 90 V8