To arrive at the X6, BMW took the seven-passenger X5 chassis and created a lower-slung SUV with a dramatically sloping rear roofline that only seats four. The aggressive new sheetmetal makes the X5 look comparatively conservative, and it’s a key point here, because the X6 is less practical than the X5, while its price has been jacked up by as much as $8500. If the styling isn’t what you look for in this BMW then take a look under the hood. In the xDrive35i you’ll find the overachieving 300-hp, direct-injection, twin-turbo, 3.0-liter inline-six we all know from the 335i and 135i. The step-up model, called the xDrive50i, is powered by a new, twin-turbo 4.4-liter V-8. It’s rated at 400 horsepower and 450 pound-feet of torque, but if BMW works its turbo magic as it did with the inline-six, could the new V-8 feel more like 500 horses strong? The twin-turbo V8 has a nice sound to it but some think the V-8 from the X5 4.8is sounded better. A small complaint with the V-8 version is that when taking off from a stop there’s a noticeable lag in power after hitting the throttle. As you wonder whether or not you’ll merge safely in front of that approaching car, the turbo boost hits, and you get much more thrust than expected. The twin-turbo six doesn’t exhibit this “nothing, nothing, too much” behavior. The xDrive35i goes on sale at the end of April, starting at $53,275, or $6600 more than an X5 3.0si. Add in things such as the $4550 for the Sport package with 20-inch wheels, the $1900 navigation system, and the impressive-sounding $2000 stereo, and the loaded cars we drove were pushing $70,000. The xDrive50i model won’t be available until August and goes for $63,775. Plan on $80,000 for one with all the goodies. This car may be expensive but its worth the money when you get behind the wheel.