http://www.performanceimportsatlanta.com/who.asp

I do not have a Porsche and have not gotten service but check them out. I co-drive a 911 that is serviced there (may actually be stored there now) a couple times a year. Swing by and meet a couple of the guys. They straightened out a situation with a friends 2.8Q A4 that the other boneheads botched up.