Recon
For good clean simple urban wear you could allways have a look at the stock they carry over at Recon. Some of their stuff is really nice, and the tees are only $25 a shirt. They also stock a variety of other items like longsleeves, hats, polos and bags, and if you are at any of these locations they have stores in NYC, San Francisco and Tokyo, but you can allways get the stuff online, too.