For those interested in badminton around the washington DC area, Ronney Choong are well known. He provides most of the badminton stuffs, from rackets, shuttles, shoes, even wraps. The prices are quite reasonable, most of them are $10 or 20 less then the normal price, especially for Yangyang racket, which is almost half of the market price. As several friends ask about his contact information, I'd like to give it out here
It is in Rockville, MD.
You may also order all these stuffs online, but the shipping fee will beat you.