i would suggest you check out the neighborhood near the national cathedral. its not exactly party central, but not far from M Street in Georgetown (which is just a couple miles south on Wisconsin), and a short car ride down massachusetts avenue to DuPont Circle.
im sorry, i think chinatown just sucks.
i had a friend whose car was broken into there (yes, i know that happens in a lot of places, but read on...), the rats are like a plague at times, and the air quality is nasty from automobile traffic. i always thought there were a lot of *******s there, usually being people who moved through the area for their personal business, and took metro to get to where they live....but then again, its a happening place where lots of young people convene. please note: IT HAS A FUDDRUCKERS! (and thats a good thing).
dupont circle is a great place that i think you might be happy in (based on your research and "love" of that place).
where in maryland is your job? if in PG county, heck, chinatown is just a block or two to route 50. if up in montgomery, dupont wins, in my estimation (connecticut ave north, or the rock creek parkway/beech road).
good luck on your decision!