Greetings, I'm traveling at the moment but I will recommend my preferred service shop R.O.C.S. in Belleville. Ask for Rich and tell him Perfectlap referred you. They have very competitive pricing on labor and have in-house lazer alignment. There's always a Boxster there for service.
If you have general questions I'd be happy to answer if you can wait a day.
Porsche & BMW Specialists - Classic & Modern