I second Catty here. I used Quality Transfer and Storage for three moves in the past 9 months.
Incredible customer service, reasonable prices and nothing was broken. The years of experience show.
Ask Jane (I'm not sure if she is the manager, but she usually answers the phones) for Robert and Rodney. They are the best. On my last move they actually physically carried me into my apartment. I was sick and they took care of me.
Phone #: 301-863-5050