You mentioned growler shops. Unfortunately, they're few and far between because of the crazy liqour laws in PA, so you pretty much have to go to a brewery / brewpub for that. East End Brewing in Pittsburgh is pretty decent ( http://www.eastendbrewing.com/
) and does "growler hours" a couple of times a week. If you're looking for a bottle shop that has a good local selection, the Foodery in Philly is supposed to be pretty good.
I'm afraid I can't add much else that hasn't been said already. There are definitely far more options in Eastern PA. If you're willing to take a little side trip, Stoudt's is near Reading and makes some excellent brews ( http://www.stoudtsbeer.com/