Where can I buy and try on motorcycle helmets in the DC Metro Area?

I need to find a place to buy a motorcycle helmet in the Washington DC Metro Area and I don't trust buying over the internet. In order to be most comfortable I need to try my helmets on prior to purchase. Does anyone know where I can go?

Its alot of Motorcycle Shops in the DC Metro Area, you have Clinton Cycles in Clinton, MD, Free State and High Performace in Capitol Heights, MD, Atlantic Cycles, Southern MD, Heysers in Laurel, MD. Those are some of the most popular ones. I would also go to Yahoo Yellow pages put in your zip code and do a search for Motorcycle Dealers in the area and call a few and see if they carry assessories.