The most important thing in judging a car is where it is being driven. Driving a car in downtown London is different then cruising on a road in South America. I drive the greatest roadways on the planet Earth, the Southern California Freeways. My 550 has never lost but to safety. It eats Porsche for brunch. I have never seen a Mercedes or BMW to kick butt of a Porsche. Never drive less than a 12 cylinders.