As an owner of both a M6 and an X6 (and limited parking space @ home)
I'm watching this and the E70 closely. If the ///M group takes this car and drops in a V10 or a nicely tuned TTV8, I may consider consolidating.
I actually prefer the rear of the hybrid, but it's still early in the game.. let's see how it develops.
Credit to BMW for stepping out of the mold...