I would say that a commute from East Amwell would be one of the better ones from Hunterdon. You can shoot down route 31 and turn on harbourton road and take that out to 95s and bypass Pennington. Shouldn't take more than 45 min. There is also West Amwell, parts of Raritan twp and Delaware twp that would be good too.
60min seems like a long time but I would that probably depends in where in Philly you are going. I work in and grew up in that market area if you need anymore help don't hesitate to call!