I love mexican and tex-mex so I am always trying new ones in D.C. and VA and have been to them all-promise. I really think the new Don Lobos, right at the edge of Georgetown-next to Zed's and Furin's has some great food. The owner/manager is eager to please.
The best dish is not even on the menu-Enchiladas with tomatillo sauce-best in DC, period. I told him to put them on the menu so we will see. The sauces are made from scratch and definately remind me of some good restaurants in Austin-miss those days. The fajitas are awsome as well. The frozen margaritas and the atmosphere are so-so but service and food, like I said are top notch-FOR DC.
Also-grab a few sugar cookies next door at Furin's and your life in DC will not be the same thereafter.