The BMW M6 Coupe offers track-quality performance in the company's most attractive body style. Designed in 2006, it melds the upscale four-passenger luxury of the 6-Series coupe with BMW's race-developed 500 horsepower V10 engine, high-tech suspension, and the same extensive list of innovations as available on the 6-Series.

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The only drawbacks identified by reviewers are inherent in that technology. In particular, the seven-speed sequential gearbox (SMG) with electronically-operated clutches, introduced in 2006, doesn't appeal to everyone. Starting in 2008, BMW's regular six-speed manual transmission is a no-cost alternative, which may better suit some enthusiasts. For ultimate performance, however, the SMG winds hands down, making it suited to track use.

The styling of the 6-Series is thought by many to be the best in the BMW line-up, with the smooth coupe lines making the rear-end styling look much more graceful than on the sedans. To set the M6 apart from the standard 6-Series, as well as to improve aerodynamics and road grip, the car is fitted with a distinctive front air dam that channels air flow to the engine and brakes, a rear air diffuser flanked by four tail pipes, sculpted rocker panels and side gills in the front fenders.

Though not obvious, the roof of the M6 is made of carbon fiber, keeping the car's weight to just under 4000 pounds. Though the high-revving engine is more than capable of moving that much weight in a spirited manner, gas mileage is rated at only 11 mpg city and 17 highway.

Track performance is improved with the intelligent electronic M differential and dynamic stability control with selective M Dynamic mode that allows a higher degree of wheel slip before engaging to permit some rear end drift in spirited driving. Electronic damping control also allows the driver to change shock absorber settings to suit driving conditions and intentions. Large brake rotors, nearly 15 inches in diameter are standard.

On the interior, front seat space is quite comfortable and the supportive sports seats are a good choice for spirited driving, but rear seats, though quite comfortable, are fairly limited for taller adults. Trunk space is about average for mid-sized coupes and sedans.

Most luxury features are standard on the M6, including park distance control, leather upholstery, dual-zone climate control, eight-speaker audio system, auto-dimming mirrors, xenon adaptive headlamps, and moonroof. The optional Sport Package upgrades the seats, wheels and tires for the more performance-oriented owner. Cutting-edge options include BMW's innovative heads-up windshield display with special M display, radar-managed cruise control, a night-vision screen, navigation, satellite and high-definition radio, and heated front seats.

An important aspect of all this technology is that everything, from audio to ventilation is controlled by the single-knob BMW iDrive system. Opinions differ widely on this system, even with recent improvements. Younger, more computer-savvy, reviewers find no problem mastering the system, while more traditional critics complain about the five or six separate actions required to do a simple task like change a radio channel.

As with all other BMWs in the current line-up, safety features are extensive, including multi-stage front airbags, front-seat mounted side-impact airbags, curtain-style head protection, ABS with brake assist and brake-force distribution, tire-pressure monitors, and the fully-equipped first-aid kit that has always been packed in BMW trunks. BMW's Assist telematics system with automatic collision notification and SOS button.