Hello,
There are a lot of nice apartments in the Herndon/Reston area. I just moved to Herndon a little over a month ago. I did a good deal of looking over apartments in the area. I ended up going with The Metropolitan of Fairfax in Herndon -
http://www.metfairfax.com It is a very nice complex, only a couple years old, garage parking and a great staff. You can also walk right down the street to a grocery store, places to eat, a gym, etc. - Clock Tower Center off Centerville Rd.
A newer 1 bedroom in the area is roughly $1100 to $1400. You may also want to check out (broken link)