Yup, agree on the sheer stopping power of all BMWs. I guess on the Autobahn, you gotta be able to do 100-0 stops on a repeated basis.

The biggest concern, as mentioned above, is people behind you not being able to stop in time. In my opinion, its often those American muscle cars that have the worst brakes in proportion to their acceleration abilities. The rotors on the Mustang I had were the size of milk bottle caps.