Best areas to invest $150k within 3 hrs driving distance from NJ?

[Bob Roach]

My search criteria:

• Cash flow is more important than appreciation
• Should be in an area where rental demand is high
• Should be in an area where it is relatively easy to sell. 
• Availability of management companies since I do not plan to manage the property myself
• Not interested in flipping 
• Property needs to be within approximately 3-4 hrs driving distance from central NJ.

So far I have considered the areas close to the university in Philadelphia. Jersey city (NJ), Union City (NJ). 

Before I decide to focus on an area I wanted to know which other areas would the experienced investors here recommend based on my criteria. Also, which state is most land lord friendly amongst these NJ,NY,PA,CT,MD,DE?