I was driving the Audi V12 before - torgque is impressive, but handling always let you feel the size of the car. I dont know the X5M, but I know the X5 in all variations and especially with the dynamic ride. This is no comparrision worth at all. The BMW is lightweight and handles like a sports car, versus that the Audi seem to be a truck!

A friend has a 911 Turbo Convertible and also the Audi V12 truck. He is not happy with the V12 from the handling at all. He thinks about making the move to the new Cayenne Turbo.