Redesigned as a 2006.5 model, the current-generation Kia Optima returns to the midsize sedan segment in 2008 as a leader in safety, comfort and convenience. A recipient of a "Good" rating from the Insurance Institute for Highway Safety (IIHS) and a five-star crash rating in frontal and side impact tests from the U.S. Department of Transportation's National Highway Traffic Safety Administration (NHTSA), Optima continues to offer consumers the highest level of safety in the midsize sedan...