I picked up my new CP M6 GC last weekend .. traded 13 M5 specifically for the CP and ceramics.
This isn't just a minor upgrade but a major step up in dynamics, ride, feel and control. The ceramics are also so much better than the standard. (I noticed the same improvement when I changed my 911 to ceramics)
Still running the car in but even sticking to the 5,500 rpm limit you can feel the difference just pulling away from the dealership. I went for a drive through the Malibu canyons on Labor Day - this drives so much "smaller" than the M5
I have been an M5 guy for 20 years now and this is the best sorted M we have had since the E39 (and I think it is even better than that)
can't wait to have it run in