I just want to echo the praise a couple of Chowhounds have already given to Jamaica, Jamaica in Herndon. Located in a modern industrial park, all the food was very good looking, savory, well-prepared and outright delicious.
Didn't try the patties, as they are shipped from elsewhere, but the chicken and goat dishes accompanied by a nice selection of beverages (I had a can of Irish Moss) will really bring you to the island. I'm told that on the weekends they do the fritters, salt fish, and festival. It's kind of hard to believe these folks are doing their thing in Herndon, but every neighborhood should be so lucky.