Roundtree & Yorke at Dillard's. They've got several different styles - pleated, non-pleated, cuffed, no cuffs - as well as all cotton and cotton blends, and the linked ones are polyester. The ones I buy are all cotton, washable, they keep a crease pretty well, they're 2 pairs for $78 and they hold up pretty well. My commute is 8 miles each way, but pretty flat and dress code here is more casual than the OP's.