BMW's most aggressive grand touring model is the M6, a performance-tuned version of the 6 Series
. The M6 is mechanically similar to the M5
sedan, but shrouds its speed potential in a shaplier body. Bodies, actually: convertible and Gran Coupe variants live alongside a traditional two-door. If you want to look good and be comfortable while moving quickly, the M6 is one of the best ways to do it.