Personally I look at the time taken to commute rather than the distance. Where I live a new bypass has been built which has resulted in a hell of a lot more traffic rather than calming it. So unless I set off at 06.30-06.45 then it can take me the best part of 45 minutes to do a six mile journey. However I could work somewhere else in the opposite direction, it be twice the distance, I can set off later and get there in half the time.
All depends what you want to compromise really be it travel expenses, travel time or quality of life