Don’t look now, but Kia is now making a high-end model. This past summer, Kia unveiled the Cadenza, a sedan featuring generous proportions and very modern lines. Only one engine is offered, a 293-hp 3.3L V6 with front-wheel drive and a six-speed automatic transmission. And the Cadenza’s rivals aren’t exactly tomato cans: Buick Lacrosse, Lexus ES, Nissan Maxima, Toyota Avalon and its cousin, the Hyundai Genesis.