Colfax Avenue boasts many obvious retail charms, from perennial favorites like the Tattered Cover and Twist & Shout to a revolving ragtag revue of cupcake bakeries, comic-book stores, coffeehouses and stores that sell collectible toys. But on down the road to the east, in downtown Aurora, the Collection Studio brings new life to a building donated by Troy Gladwell of Medici Communities. The consignment gallery, run by the Aurora Arts District (which shares the space), benefits both the non-profit organization and the Colorado artists who show work there, bringing a much-needed cultural edge to the Aurora corridor.