Socal,
I take my car there for all service since my car unfortunately is out of warranty : (
I haven't had any experience with either Porsche dealership (Newport, or Riverside) so I wouldn't be able to help you there. You may want to start using Hergeshiemer, and have them check out warranty possibilities then shoot over to Newport to have fixed so you know exactly what is wrong before things are fixed.
Auto detailers.....good questions.
I know for a fact I would NEVER EVER EVER take it to the local, or well known car wash to have them detail it....EVER, not even for free, and gave me unlimited washes for a year!
I would check with Mar-Co Distribution in Costa Mesa 949-574-7676 and ask for 5 people they recommend.
www.detailingdepot.com then go from there