On the I-95 corrider, at least my section, there are quite a few decent courses. One gem-in-the-rough is Augustine Golf Club, by Rick Jacobson. Mattaponi Springs Golf Club is great. Pendleton is also a cute course by Richmond. A little off the ways is Greystone Golf Club, north of Towson, MD. And there's still Bulle Rock. And on 395, south of DC, is Bill Love's Laurel Hill.
Of these, only Mattaponi Springs is Beechtree's equal, but they are all good choices.