Filippa K, Gant, Dior Homme, Tommy Hilfiger   True, the notion of trouser-cut denim may call to mind the kind of oversize weekendwear favored by middle-aged guys trying to hide a paunch (or worse, mom jeans). But serious times call for serious men, and serious men wear pants that fit, even on weekends.  Filippa K Steve denim pants, $225, available at oaknyc.com; limited-edition Gant oord button-down created by Jeffrey Kalinsky, $195, available at gant.com; Dior Homme leather belt, $285, available at Dior Homme NYC, (212) 421-6009, diorhomme.com; Tommy Hilfiger Chelsea boots, $350, available at tommy.com
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