Oh, well hell yeah -- I've lived in Southern Maryland -- solid wood is much better than particle board. It's also more expensive to purchase. If you know not to leave particle board in a humid area (I.E. "outside" or "with the windows open" in the DC area), it won't fall apart when you accidentally do anything to it, but it's not bad for starter pieces.
Chris -- there are some good solid wood places, I'm only finding one, right now (and I can't guarantee it's worth the trip), but just look around. Montgomery County is probably not the best place to shop for prices. I'd probably start in Howard County, or plan a trip to Charles County, but get a list of places to visit first.