We (O'Donnell Real Estate) are the best in my humble unbiased opinion
In all seriousness I think we are. In this neighborhood or really any Philly neighborhood - things are often block by block and the condition of the houses vary greatly. So you want to work with someone who is VERY familiar with the neighborhood, not just can find their way around.
So I would suggest whereever you look - go with a local Realtor. When you are talking about the difference of 10's of thousands of dollars you don't want to just work with your cousin boyfriends neighbor who is doesn't even know what a catchment is let alone the boundaries. Go with an expert. You will be glad you did.