My suggestion would be for you to visit a number of them and pick the ones you want to attend on a regular basis.

If you are planning to buy in NC, I would suggest you come for a visit a few times to make sure you are not purchasing blindly. 

I have just landed in Knoxville and am going to visit a dealI would look at irem.org for management companies.  

It's almost a certainty that the Philadelphia numbers are inflated by the Pope's visit as @Lucas Pfaffalready posted.

This can be tricky as most probably a) you will need to physically visit a branch; b) they might ask you for your personal Tax Identification Number.

Check them out on Meetup and visit a few whenever you have time.

I picked Huntington mainly because they are everywhere in my area and I have tenants who simply visit a branch office and deposit their rent in my account every month.I also have another account for that same LLC with a local community bank.

I rented out my SFR nearly two years ago; the same tenants have been there the whole time.The last time I went over for a regular maintenance visit, a couple of months ago, one of them asked me how often I had put batteries (2 AA) in the thermostat while I was working on the house. 

Some people believe that they can buy a condo for example, visit a few months out of the year and use the rest of the year to pay for it.  

As an OOS investor you will be in an a disadvantage vs the locals you will never have their knowledge or ability to visit a property or neighborhood after work like they can.