Though I visited only occasionally (I have some budget concerns) I never felt that I overpaid at Napa, and every meal I've eaten there has been memorable. If you haven't tried them yet, you might want to check them out before they close. And if you are a regular, I don't need to tell you to reserve a night for a last visit. The good news is that they will continue to operate the catering portion of their business. You can learn more about that from their website. Napa's food is excellent. Please consider them for your next special event.
As someone who has worked (but doesn't currently) in the food service industry on H Street, you might also consider tossing your server a couple of dollars extra. With the tight economy, new work doesn't come as easy as it once did (and servers really do work much harder than it appears for their tips).