Mazda pitches its 6 sedan as the fun-to-drive alternative to more boring family sedans. But is that really the case? Does it have the basics down pat, compared to a Ford Fusion, a Honda Accord, or a Nissan Altima? Mazda has one thing in its win column--looks. We'd put the Mazda 6 right next to the new 2013 Ford Fusion for the best styling in the...