I had regular cashmere silver on a 135i and didn't like it much, it was too tan/champagne and like a boring luxury color from the old acura legend.
https://www.google.com/search?tbm=is...gne&tbs=imgo:1
But for some reason even the color itself (not just the frozen / matte surface) looks so much better on your M5! Looks really good. And it's making me strongly consider ordering this color on an M4, so I am hoping to confirm that I like the color as much as I think I do from your other pictures...
Do you have some more photos of the car in different lighting conditions that you can share?
The only other car I could find in the color is here, but it was repainted from alpine white to frozen cashmere, so it may not be like yours:
http://www.e90post.com/forums/showthread.php?p=18707976