The NYT carries a glowing review of the updated X6 M, the BMW űber-crossover - laced with the obligatory post-modernist ironic remarks ("Challenging the Laws of Physics," 19 Nov. 2009). The author chides all those uptight skeptics who still hold to the old-fashioned notion that a 2.5 ton gas-guzzler should be, well, "practical." His retort: "Fun is the X6 M’s raison d’être." What can beat that, really?