What is the test of a great automotive design? How about six years running without a major redo and still riding high atop the sales charts? That's the story of the Acura MDX, one of the most successful luxury SUVs to hit the market. The MDX holds the right combination of size, fuel economy, styling and luxury, not too mention a five-year resale value that is the envy of the industry. Large enough to hold seven people but much better suited to four with luggage, the MDX is perfect for small families or empty-nesters who enjoy spending road time with another couple.