Another place that's not entirely local but close to it is EarHead Audio in Winchester, VA. They carry things you can't usually hear like Omega loudspeakers, Decware tube amps, and LSA speakers. I got my Heed amplifier and pre-amp there. It's by appointment only (Frank has two downstairs listening rooms) and a very friendly way to hear some good equipment. I don't have any relation to them except being a happy customer.