There is always Licoln Tech but I would not reccomend them.
I went to the Automotive Training Center in Exton. It was a really good school and has expanded since I went there. They have a website www.autotraining.com
I have been working for about 10 years now and still like my job. Its a great field going through a growth spurt right now. Not enough qualified techs ot there. Where in the Philly area are you from?