The folks at Bankrate have compared U.S. cities based on some pretty broad categories including cost of living, healthcare, culture, and walkability. The cities are then ranked based on their overall score in those categories, with the idea that the higher the score the better the location for retirement.
Within Arlington, my own neighborhood of Riverwood is ranked #1, and has a population of just 173 out of a population of 209,000 for Arlington.
Within Riverwood, we live in a stone house on the highest hill, at the end of a cul-de-sac, off of another cul-de-sac, but just one stop light to Georgetown.
We have lived in this house for 19 years. It was probably a good buy.