The Aston Martin Vantage is the smallest, sportiest model in the British brand's range, and while it's also the least exclusive, it might be the most coveted by enthusiasts. For 2014, there are three models of the Vantage sold in the U.S.: the V8 Vantage and V8 Vantage S (and their roadster variants), and the V12 Vantage S, which...