This issue has only really become pressing to me since my accident:
http://www.pelicanparts.com/cgi-bin/vb/showthread.php?s=&threadid=53844
When I spoke to the other party's insurance company, I made perfectly clear that I was going to get the collision and paint work done at a shop that had experience with Porsches. I settled on taking the car to Autobahn Autobody and Phil has been a great resource and help.
They are a factory approved shop for Rolls-Royce and Bentley and when I spoke to Phil last week he took me on a tour of their facility. There were a couple of Rolls, Bentleys, Ferraris, Jags, and Porsches, all in various states of repair. Their finished products look first class in terms of fit and finish. I am just negotiating how much more it will cost if I get the entire car resprayed in a proper manner.
For me, I think that a quality respray will add to the value of a car as long as it is not being judge for originality. I put it in the same group of "value upgrades."