The 2008 BMW M sports car is available as a hatchback coupe or roadster with a power-operated soft convertible top. The M is distinguished from its lesser Z4 sibling through subtle but purposeful styling enhancements including a more aggressive front fascia with larger air inlets, a pair of "precision" ridges in its aluminum hood and a set of quad exhaust outlets flanking a rear air diffuser.As a line-topping vehicle, the single-trim M includes many Z4 options as standard equipment. These include 18-inch wheels, xenon headlights, leather sport seats and a 10-speaker audio system with CD/MP3 player. If you want cruise control and elastic storage nets, though, be prepared to ante up for the optional Premium Package. With this package you'll also get auto-dimming mirrors, eight-way power seats with driver memory settings, BMW Assist, Bluetooth connectivity and a THX-certified premium audio system. Other options include higher-grade full interior leather trim, heated seats, wood or carbon and leather accents, and a navigation system.