Reviewing the BMW M5 and M6 In Sunday's Automobiles section, Lawrence Ulrich reviews the 2013 BMW M5 and the M6 coupe and convertible. Historically, these models were the snorting doppelgängers to their fast but more polite equivalents in the 5 and 6 Series. As Mr. Ulrich writes, however, a measure of restraint, if not timidity, has entered into the M formula: There's a sense that technical proficiency has upstaged old-time BMW fun. As they devour the road, taming every difficult passage, these M's are tuxedo-clad prodigies in a hushed concert hall. The performance amazes, but you find yourself craving the raw, rude fire of the Beastie Boys. Combined with prices that easily eclipse the six-figure mark, the new M's are not the paragons of their breed -- a breed they helped create -- that they once were. Read the entire review, check out a slide show of previous M cars that were brighter, if not quicker, than the 2013 models, and share your thoughts on the new M5 and M6 in the comments.