I have a 2008 Kia Optima. It's a great car and it always runs fine. I especially like that it has controls for the radio built into the steering wheel. I can change the station and adjust the volume without taking my hands off the wheel! Mine is silver with a white interior.

The Kia Optima LX rides smoothly and handles well. It has quite a bit of power when needed and is incredibly fuel efficient. We had a similar car (Toyota Corolla, same interior color and exterior color and very similar body) that cost more and didn't seem to have as much power. I'd recommend Kia as a brand, and the Optima in general, if you're needing a mid-size sedan.