Well that is a tough one to answer as buyers usually are looking for there own specific needs and wants. Since you are asking about low end PA homes, then I would say a 3/2 with a family room would get more interest.
Here's the thing this all depends on location, schools, the floor plan,condition of the home, and the condition of the other homes on that street. You generally want to purchase the worst home on a good street, with good schools, so with a minimum of up grades your value should increase.
I hope that helps, feel free to contact me with any questions.
At your service,