What do you need done? Emissions and Safety inspection for registration purposes?
I took my car to Dulles Dodge in Chantilly, right off of RT.50/RT.28.
Didn't put me on a totem pole cause I was a viper owner or anything, but then again, they probably didn't like the fact that I was so young. The Viper tech seemed to be busy and really didn't talk to me at all, in fact some other guy performed the safety inspection (which was about 2 minutes long) and the dyno/emissions. It was quick and painless, and I got to sit and watch from right outside the garage bay. Plus, its 10 minutes from my house.
Don't know how I would feel about sending my car to anyone for something major besides Chuck "The Wizard" Tator and the dealer I bought the car from (Roanoke Motors).