There's a new name on our list of possible Best Car To Buy winners. The 2021 Kia K5 replaced the Optima this year, and while we'll take a real name over alphanumeric badges any day, the K5 neatly erases the Optima from our memory banks and fills the void with feel-good family-car vibes. Wider, lower, longer, and more handsome than the Optima it...