In the middle of Audi’s lineup sits the A6, and it is available in two body configurations: sedan or station wagon. Now in its third generation, the A6 utilizes extensive technological and luxurious appointments. The S6 model adds performance to the midsize luxury sedan with a 420-horsepower V-8 and sport-tuned suspension. With a base price in the low-$40,000, the A6 is up against some of the best luxury sedans on the market. The Audi A6 comes with a four-year/50,000-mile warranty and gets an estimated 23-27 mpg on the highway.