Even though I live close to Livermore Porsche, I go to Fletcher Jones Porsche in Fremont.
On two separate occasions, I have had bad experiences trying to deal with Livermore - they just don't seem to care.
At Fletcher Jones in Fremont (510-279-3695), Gunter, the service manager, knows his Porsches, is flexible with special requests (I provided a 2nd remote, he was happy to order a cut key from Porsche and program both the old/new remotes) and provides excellent service. They provide a free loaner if they have to keep you car overnight (Enterprise site right behind their service department - I got a new Mercedes C class).
In addition, Fremont is a big supporter of the PCA Diablo Region. They sponsor track events and provide specials as well as open houses. Well worth the extra windshield time.