I recently went on a date with a guy from Hong Kong and he brought me to Bao Bao Hao, at 10th and Race, which is where he says the population of Chinatown agrees is the best place for Cantonese food in Philadelphia.
We had delicious congee with mixed shellfish, oysters in black bean sauce with scallions, and clams "Hong Kong style," which apparently means fried with red and green (sweet) peppers and ground pork.
All was DELICIOUS and fairly different from other Chinese food I've had in the states, though the congee (somewhere between chicken rice soup and risotto) was exactly how I remembered it from a trip to Hong Kong a few years ago. It felt extremely authentic... they only have a couple of menus in English that get passed around for those of us who needed them!
Unfortunately or fortunately, he picked up the tab, so I can't tell you what it cost. From our surroundings, I'd assume it wasn't too over the top.
Everyone should check it out :)