Since its inception in 1963, the engineers at Porsche have spent nearly every moment overcoming a design flaw that makes the 911 unique; a rear-engine, rear-wheel-drive car is inherently unstable. In spite of this obstacle, the car stands as an example of what a sports car should be, and the 911 50th Anniversary Edition ($125,000) continues that heritage. With a 430 hp flat six that reaches speeds of 186 mph and does zero to 60 in 4.2 seconds, it's equally at home on the road or the track. Porsche Active Suspension Management, a sport exhaust system, and 20-inch wheels recall its 50-year history of performance. With only 1,963 models going into production, you'd better reserve yours now.