Re: brake set up question??
If you want to keep the costs under $3,000 for a kit ther are basically two ways you can go. Which ever way you go the calipers are the same with the only difference that one may Say AMG, Mercedes Benz, or nothing on the side:
345mm Rotors - Calipers and rotors from a C32, CLK500, CLK55
330mm Rotors - SRT-6/SLK32 rotors and CL500, S500 calipers
The 330mm setup can be much cheaper becasue he calipers are more common and brand new rotors are about $109 each new from the dealer.
Racing pads should not be used on the street as they are not very safe when cold and when cold wear the rotors very quickly.
I prefer Ceramic pads on the street and the rotors and pads will last almost forever with no dust and great braking. If you track your car you can change pads with this set up in under 15 minutes.
I started out intending to use C32, but was able to get a nice set of calipers for $99 from a CL500 on Ebay. the 330mm are almost the same size as the C32 anyway I did notice that my brakes don't seem to be workng very hard anymore.