A lot of upper level execs at J&J live just across the border in PA (for financial reasons I'm sure). When we moved here, we debated it but my wife would've spent a lot of time on the road and time is something you can't get back and the financial savings weren't as noticeable ;-). We drew an approx 30 min commute around Somerville and looked to see if we could find something amenable. As you've probably figured by now, the further you get from the city and direct train lines into city, real estate tends to be less expensive.