I live in NP - we moved in July and for our new service got a bundle with Verizon for phone/internet and Direct TV. I had D-TV previously and really liked it. Unfortunately Fios is not here yet but should be soon. I didn't want to do comcast again! PM me if you have any questions about the area.
Re: Cable and internet providers? (North Potomac area)
I have Verizon Fios for cable and internet, and I'm happy with them. They often have deals for $99/month for phone, cable, and internet bundled.
I used to have Comcast, and I wasn't as happy with their service.
Other providers in our area include RCN and the satellite companies (Dish and DirectTV). I don't know much about them.
I have Fios too and we love it. Their deal right now is actually $89/mo bundled with a 2 yr price guarantee and no contract, which is super.