The ones I've used so far are:
Herndon Clock and Watch, Herndon VA - great service, fair pricing
The Jewelry Doctor, Vienna VA - jewelry type watch repairs, i.e. soldering, etc.
Zaf Basha, DC (
www.classicwatch.com) - solid service without "frills" at fair prices
Liljenquist & Beckstead - Tysons Galleria, VA. AD with good service at AD prices
Rikki and Bob Ridley both have pieces from my collection. I'm sure they'll both do a great job as well. I tend to use different vendors for different watches and problem types.