In 2003, Kia introduced the midsize Sorento SUV, which for a while replaced the Sportage, which had been the brand's only sport utility since the South Korean automaker arrived in the United States in the mid-'90s. The Sportage two years later was reintroduced as a compact crossover, and remains in the Kia lineup. But the Sorento has racked up much better sales, and that continues this year. Kia had sold 26,011 Sorentos through March, compared with 9,888 of the smaller Sportage. There was no 2010 model for the U.S. market, but a completely redesigned Sorento went on sale in early 2010 as a 2011 model, based on the architecture of the Hyundai Santa Fe. It was the first product to come out of the new Kia factory in West Point, Ga., which now also builds the Santa Fe on the same assembly line. With the remake, the Sorento switched from a truck-style body-on-frame configuration to a crossover unibody design that offers more interior space, with room for up to seven passengers. T...