I'd say you should take it to Sterling, alexandria, Fairfax, Passport of VOB - at least according to the replies.
Find the one that is most convenient to you and go talk to the Service Manager. Tell him/her that you've just moved here and are looking for a dealership to service your car. Ask about loaners and so forth.
You might need to go to a few before you get a warm and fuzzy.
The dealership I go to is very friendly but has damaged my car twice - once to the point of needing a new bumper which deadlined the car for two months.