I used to teach at Dulles Aviation at HEF. They have a good operation and well maintained (albeit not so pretty) planes.
Aviation adventures at HEF and JYO also has a good rep. Stay away from AV-ED.
Thanks! Im torn between schools in FDK JYO and HEF. Although the last two are closer, it seems that FDK is faster to get to. Also FDK is outside the SFRA. There's some schools at GAI but I haven't heard the best things about them in terms of maintenance and instructors, plus they are well inside the SFRA which isnt fun...
What's wrong with AV-ED? At this point I'm more interested in quality instructors and aircraft over cost.