DC restaurant for Golden Wedding Anniversary

Help! I need a recommendation for a special occasion restaurant, preferably in DC, to celebrate my parents' 50th wedding anniversary early next month. There will be just 4 of us, and I really want to make this dinner special. My parents lived in France and Belgium for a number of years, and do like the cuisines of both countries, but I would consider a seafood restaurant as well, so I'm somewhat open. The most important criteria are excellent food and service and a lovely ambiance with not too much noise. If the restaurant could go a bit out of their way to make this evening special would be lovely too. Budget-wise, I'd like to keep the total at or below $500, so I think that eliminates Plume and Marcel's -- maybe Citronelle as well? We will want wine with dinner, but the wine list doesn't have to be too top of the line. Another option there would be to bring our own -- does anyone know what the typical corkage fee runs?

Once of reasons I picked DC was that we want to hire a limo to drive us from Potomac to the city, and the view of DC coming from GW parkway at night -- with the monuments all lit up -- is just spectacular, so I thought it would help make the night even more special. However, I would consider Bethesda or elsewhere if the drive didn't exceed 30-40 minutes from Potomac.

Thank you so much -- I know I need to make a reservation ASAP, so look forward to hearing your suggestions!