I'm going to be in Philly for one day and will definitely be getting a cheesesteak for lunch. I don't know where yet but I can figure that out on my own. What i don't know is what to do for dinner. What food can't be missed while in Philly that is hard to find elsewhere? I'm open to all price ranges (but I assume any fine dining establishment is unlikely to be very uniquely Philly) and neighborhoods. Thanks for the help.