To overcome any hesitancy you may have in locking horns with the insurance company think of it this way:
You are out on the hunt for a Porsche (pick your model), you're considering two potentials with similar miles / condition but one has a Carfax record, maybe even shows signs of waviness from aging or shoddy filler prep, Which one are YOU going to buy?
Remember that when the insurance company tries to whittle you down on properly repairing it. I'd even go to a Porsche dealership (if you have a friendly one near you) and ask for a letter like Steve suggested above. Never assume they are interested in your satisfaction nor the state of your car after the repair, THAT responsibility falls squarely on YOUR shoulders at this point. Good Luck......
