2010 BMW X6BMW isn't the first manufacturer to call a non-coupe a coupe.The midsizer, which is based on the BMW X5, has a dramatically downward-sloping roof line, evoking the timeless profiles of classic fastback coupes (or, less charitably, the Pontiac Aztek). As such, style trumps utility. Overall, the BMW X6 is a capable niche vehicle that should appeal to those who want solid BMW SUV