Summary: Buyers of luxury cars aren't solely interested in features or performance -- oftentimes it is the philosophy and image of a brand. Infiniti, a brand with an identity that lies somewhere between the sportier offerings of BMW and the plush indulgence of Lexus, has found an overlap between sporting performance and sumptuous luxury, carving out a respectable niche for itself. The Infiniti M Sedan is an excellent example of the brand's well-rounded approach to vehicle design.