I live close to DC on the Virginia side. MD is a lot cheaper. A 1-br can be as little as $750-$850 way out in the 'burbs. Closer in you are talking $900 to $1025. Way out (Loudoun county) you're looking at $1350 for a good 2-br and in the $1750 range for a NICE 2-br closer in...
Salaries are lower, though...SF is at 130% of the National average for salary, DC is at 111%. Still, you have more at the end of the day here...