I recently started working in Philly again but live in NJ. I thinking of making the same move as you. Bucks and Montgomery are very nice. The thing about Bucks is that it has gotten expensive with everyone moving from NJ to escape the taxes. Montgomery is still cheapish. Freemail me and I can give you more details.
If they are moving from LA, anything in Bucks or Montgomery will seem like a bargain in comparison.