well, I've had an actual "Philly" Cheesesteak, and since I live in southern california, and therefore unable to get another of that killer quality, I have to go with Snows Clam Chowdah... its scrumtrilesant.
I'm about 40 minutes outside of Philly(being a cowboys fan, its been a hard life), and I've had my share of Gino's and Jims.
My friends and I once drove to florida(16 hours) and stopped in North Carolina for something to eat. The following will only be gotten by Philadelphians. I ordered an "Original Philadelphia-style Cheesesteak". I was served a grizzly sirloin steak on white bread with a slice of white american cheese.
I'll have to go with the cheesesteak, but that in no way puts me in the eagle's corner