What are the best neighborhoods in philadelphia for single women 40 ?

I'm considering relocating to the area for work within the next few months (spring/summer '17). While I've traveled to the area on business in the past, I'm not sure what would be the best areas in which to live. I have been living in a college town/bedroom community in a suburb west of Boston and love that I can walk to shops, restaurants, train into the city, and anything else I would need is no more than a 20 minute drive away. Any thoughts?