Western fairfax county for special occasion

My husband's birthday is coming up in mid December and it is a big one. We want to do something special but don't want to do a long trip so close to the holidays. Our daughter and son-in-law just moved to western fairfax county and suggested we come down there for a few days and celebrate with them. Any suggestions for a special occasion restaurant not too terribly far from their home? We could drive to Alexandria or even the district but kind of want to see what their local vicinity has to offer