We like Cheng's in Sterling and I do believe people travel from a ways to go there. When we moved to the area, people kept asking us, "Have you tried Cheng's Have you tried Cheng's?" We have been to China and have adopted a child from China, so we do know real Chinese food. But it is large and clean, and has lots of interesting decorations for the "American-y Chinese aficionados" (like a pond in the middle, with a little bubbling brook and fish, and a bridge that crosses over it), and has both "real" and "Americanized" Chinese food.
http://www.chengsorientalva.com/about.php