There's a new game in town, and the 2005 Cadillac STS is writing the rules. At long last, Cadillac has delivered on the promise of the original Seville Touring Sedan: a car that people who like to drive will want to drive. The new STS gets GM's newest V6 and V8 engines, both of which boast the latest in computerized engine management and variable valve timing. The result is smooth, efficient power. And speaking of smooth, the new STS offers a choice of suspensions, too, from the traditional, keyed more to commuting, to the extraordinary, actively compensating for and adjusting to a host of inputs, large and small, smooth and sharp. But the headline here is that the STS returns to rear-wheel drive, an essential element for truly spirited driving. All-wheel drive can be had as well, putting the STS head to head with the best of the world in the handling competition. There's much more in the hardware and technology arenas, but enough of the gearhead stuff. STS is blessed with Cadillac's best interior ever, with comfortable but supportive seats that are infinitely adjustable, ample storage space, and superior sound systems. Most important, state-of-the-art occupant safety is standard. Cadillac's top management rolled the dice. It empowered its stylists and engineers to create an all-new STS, one designed and outfitted from the tires up with one goal in sight: a car meant to bring as much joy and pleasure to the driver as it does comfort and convenience to the passengers. If the 2005 STS is any gauge, there's new life in the wreath and crest.