UK-based online store, 3rd and 56th Street Clothing has a great-looking site. It has an old Grand Giugnol theater look to it and a tongue-in-cheek approach to their merchandise. It carries some of th familiar Goth labels to the U.S. like Hot Topic and Emily Strange, but what you really want to check out is their selections of great dark graphic tees and fun punk/goth dresses.