The 2011 Kia Optima SX delivers performance of a V6 powered car, but delivers fuel economy of a four-cylinder car, has belligerent good looks and comes with plenty of features and has extended warranty.Cons:The 2011 Kia Optima SX’s tires suffer from poor grip, the headroom surely will be a problem for the taller occupants and the steering of the car has a numb feel.Preface:Not very long ago there was a time when you say “family sedan” people thought of a boring and solemn car that woul hardly entise...