Since your talking about philly cheesesteaks, there's a place called DiNic’s in the Reading Terminal who's Roast Pork sandwich was voted best sandwich in america on the Travel Channel. I wouldn't go that far but it is a pretty damn good sandwich. Also a place called John's Roast Pork in philly that makes another great roast pork sandwich. I usually stop in one of those 2 spots whenever i'm in philly.

Here is DiNic's Roast Pork.