Yes, years ago I visited the guy in Uptown Audio when he still had his last shop, before he moved his business into his home, which is I imagine where you went.
That's why I was trying to suggest specific stores and models, approaching DC from the southwest (rather than just throwing out lots of names of speaker brands). Gifted Lister is the first stop, and after that it's a toss up between Deja Vu (don't be deterred by the industrial estate), Evolution (haven't been there since they moved), and Command Performance (again a strange semi-subterranean building, but there's a convenient parking lot).
After that you might consider JS Audio, though my experience there wasn't great. North of DC I haven't explored. But as well as the Baltimore area you might consider Delaware, where there are a couple of good stores with interesting makes.