I still mail these guys my taxes to prepare each year even though I no longer live in Philly.
Important: they are actually CPAs, not just tax preparers. So if you get audited they can represent you to the IRS. This is key.
Their specialty is in helping MBA students to get the appropriate deductions for their education expenses. There are two CPAs in this practice (Ed Froelich and Aiden Flatley), so if you have an emergency question, one will always be able to help you.
On the expensive side ($315 for a pretty standard tax-prep package) but they are real pros.