Even though I don't live within a thousand miles of the District, I find myself often shopping by phone or internet for those times when I need something really special at a reasonable price. Great liquor selection, fine Germans and Austrians, really good Burgundy, and so forth. The consultants know their stuff. I even find myself visiting in person sometime when I find myself in the region, and come away having spent more than I planned--it's just that kind of place.
Drawbacks: Parking can be problematic; so if you can shop online or during off hours. jht