Cadillac's evolution from a builder of cushy luxo-barges to world-class touring sedans is complete, and nowhere is this transformation more evident than with the 2009 Cadillac STS. Along with the CTS, the STS has the mission of putting Cadillac back on the world's radar screen, and if ever there was a Cadillac that could lure younger buyers from their love affairs with Lexus and BMW, it's the STS. With a choice of V6 or V8 engines, rear-wheel or all-wheel drive and enough sophisticated electronics to please the most demanding technophile, about the only thing lacking from this car is a manual transmission, a feature some enthusiasts may desire.