Living/working in the District you must, must take a hard look at commute times and your working hours. If you have a sponsor/poc at wherever you're working in the Pentagon, try to get a feel for office hours and flexibility. If you don't have much flex, prioritize short commute over cute neighborhood. The less you're at the mercy of bridges and Metro (I'm sure this SafeTrack asspain wont be the last), the better your life will be. My girlfriend lived in Arlington near Pentagon City; not what I'd call a cute neighborhood but lots to do, easy walk to the Metro and minutes from the big five-sided building.