Well, be glad you chose the 55 because the new (Sept) European Car magazine has an article for a long term update of their C4S. The car had engine faliure (the second 996 in the fleet to experience this) and Porsche has been having so many faliures that the dealerships have extra "crate engines" in stock just for this problem. According to the article the C4S tester was babied during its testing and broken-in per the manufactures guide lines just to make sure. Porsche is instructing the dealers not to open the engines and just replace them. Yikes!