Thinking of moving to Philly area - need input please!?

I am looking for somewhere on the East Coast to live where I can buy an affordable home (at least 3bd for $150k or less) where the property taxes aren't going to kill me. I have three school aged boys so schools are important, and my main objective in moving to the Philly (or like) area would be the proximity to employment opportunities throughout Penn, NY, NJ and MD. What areas should I be looking in? Where should I avoid? Any direction would be very helpful. (I'm originally from the Rochester area of NY, but I've been in the southwest for 14 years, and want to raise my children in a more culturally diverse and experientially rich area (i.e. museums, cultural centers, family in NY and NJ, education opportunities, etc.) Thanks!