I am thinking of buying an 05 Audi A6 with 41,700k or considering a 07 Mazdaspeed6 with 13k on the clock. They are both in the same price range of 20grand and both are pretty loaded with options. What is a better deal I really want the Audi since it gets better mileage and more luxury but scared that I will have lots of trouble with it inthe future. The Mazda is fast and decent looking. Any opinions?