Fortunate to have 3 very good options ...
Did a post purchase inspection and my full service. Also reset my airbag light for free after i tripped it changing the window regulator. Great personal touch from a one man band.
Squire Autowerkes
http://www.squiresautowerke.com/
1515 134th Ave NE, Bellevue, WA 98005
(425) 641-3212
Will probably be doing my IMS retrofit upgrade. Have not used them yet but come highly recommended
Chris's German Auto Service
http://www.chrisgerman.com/
1503 130th NE, Bellevue, WA 98005
(425) 462-9296
Fitted my passenger airbag disable kit and supplied car set. Did an excellent job diagnosing 2 major faults on the car (and didn't charge me for it). Rediculously high repair costs but expected as it's a main dealer. Trusted by Porsche owners with factory/CPO warranty.
Barrier Porsche
http://barrier.porschedealer.com/
12000 Bel-Red Road, Bellevue, WA 98005
(425) 467-6000
Bman