My DH and I have been talking about going to Washington DC for a couple of years, but we're finally getting around to going this summer. Since I don't know DC at all, I thought I'd ask for suggestions on where to stay and what areas to avoid. We want to be close to all of the attractions (the Smithsonian,etc.) but also don't mind taking public transpo if there is a cute neighborhood that isn't too far from these sites. Any suggestions?