No more standing before a certain unnamed "denim bar," wondering where on earth to begin. No more searching specialty stores' stacks of wash-du-jour denim, wondering where they put all the stuff for guys who aren't pocket-sized indie rockers. Having expanded beyond its dingy, Birkenstock-filled basement space last year, the new and vastly improved 10,000-square-foot Tannery in Harvard Square devotes an entire well-organized wall to men's denim stars like William Rast, True Religion, and Genetic. Still can't make a pick? Brutally honest salespeople rush to the rescue, producing pairs thatmiracle of miraclesactually fit.