What parts of Arlington are the most expensive? Expensive streets? Subdivisions?

I believe that the more expensive parts of Arlington are the ones right near Vassar College and those on the north side, practically heading out towards Hyde Park or Pleasant Valley. In the middle of that you've got Main Street which is a little more urban with busy streets and local businesses, but as you get away from those, the housing costs seem to go up. An example of an expensive street around here might be Suzie Blvd., where I see four houses recently on the market and all were $530k and up.