I'm a Seattle hound who asked for recommendations a few weeks back. Many thanks for all the suggestions.
I had two nights in D.C. I returned to Corduroy the first night and had another great experience. I had the Mozzarella Porcupine appetizer. It has fried shredded phylo dough on top. Great flavors that worked well together in this unique presentation. A glass of the French chardonnay (Les Setilles) went very well with it. (I'm a Sonoma County native but I'm fed up with the woody, cloyingly sweet stuff that has become the gold standard for CA chardonnay.) I had the lamb as my entree. Again, excellent flavors, well executed. I had a glass of the New Zealand Pinot Noir, which stood up well to the lamb. Service was, if anything, too attentive -- I don't like it when they continually want to take my plate before I'm done. But they were friendly and earnest.
The second night I went to D.C. Coast. It was another good experience. I had the rabbit risotto as a starter. It was much lighter than I expected. Ample portion attractively presented. The flavors tasted like everything had been slow cooked so they could really come together. A glass of the Gewurztraminer complimented the risotto nicely -- not too sweet but more body than lighter whites. I had the black bass for an entree. I frankly don't remember it that well now, but I know that I liked it very much. I had a glass of the Benton Lane (Oregon) Pinot Noir with it. I'm a huge fan of Oregon pinots (long before Sideways), but I think a glass of the Viognier would have been a better choice to go with the fish.
I wouldn't hesitate to return to, or to recommend, either restaurant. Cheers!