There are actually a lot of options in Philadelphia, depending on what you're looking for, and where you are going to be...
If you don't want to live in the heart of Center City, but still want to be in the city, try the Art Museum area or Northern Liberties. Both are on the borders of Center City, but you can get bigger places for less $$ and parking is a little easier.
If you're looking to actually escape the city, check out East Falls, Manayunk and Roxborough. All 3 are about 10-20 minutes from the heart of the city and are considered "suburban" Philadelphia. Very convenient to Temple, PCOM, and Drexel. There are a lot of apartment complexes in these areas, and a nice 1 bedroom will run about $600-$700. Having a roommate brings the cost down considerably, as you can get a really nice 2 bedroom for $800-$1000.
These areas are also nice b/c a lot of students and young professionals call them home. Manayunk has a lot of cool bars and restaurants, so you don't have to drive into the city to go out.
I've actually lived in Roxborough for the past 4 years and am now moving into the city. If you want more info on the areas or specific buildings in suburbia, let me know.