Go for the X5M - this car has hell of a machine and will do anything you ask for. Further on, I think this will be one of the most fascinating and modern engines BMW ever build. Just reading a consumption of 13,4 Ltr/100km, this is enormously low for 555 BHP and talks itself for how modern it must be.

Further on, we have seen the pictures of the camos of the Nuerburgring, and reporters have been writing, that the car is handling like a M3! So in other words, you can not go wrong with it!