Hi!
We moved from Alexandria, VA to Fort Lauderdale 10 years ago but still have lots of family out there. Someone mentioned the Great Falls area, and just thought you should know that the commute from there is at least 90 minutes during the rush hour times. There is no good public transport from there and while the schools are good, houses are $1 million and up. Great Falls does not have any apartments or townhouses/condos.
My sister lives in Arlington near the Pentagon. A secret - if you don't know already - is to live as close as possible to the George Washington Parkway. Locals believe that it is not well signed in order to keep the tourists off of it:) Parking in DC is uber expensive so that is an additional cost.
I don't know what your husband does but if he is in the defense arena or tech/computers, etc, maybe you want him to look in the Dulles Corridor which would give you the option of living further west.
Good luck!