If you can comfortably afford it I'd get the Porsche ..... And would get a warranty as well . I would love to have a Porsche and have the money to buy one but I wouldn't feel comfortable having that amount of money tied up in a car when I I have a wife and family to provide for ....... Guess I should have bought one when I was younger! All I would say is be realistic .... If having either of them will cause you worry , stress , stretching yourself financially in my mind its not worth it ..... If not go for it ( the 911 that is )