2010 BMW X6 M only provides seating for four

Faced with three compelling choices, car shoppers may want to base their purchase decision on utility and practicality. After all, these are SUVs. While the 2010 BMW X6 M only provides seating for four, both its Benz and Porsche competitors seat five. They also provide significantly more cargo room. The Porsche Cayenne Turbo S, however, can't tow nearly as much as the Mercedes-Benz ML63 AMG or