I have driven two of your three finalists. The sonata was a limited version with a V6 and all leathered up. I drove it from Amarillo, TX to Ardmore, OK (~5 hours each way) My feeling was, though the sonata was nice as a rental car, it did not match up with the fit and finish of the Malibu and the Sonata really had zero fun factor. The ride was harsher and not nearly as quiet as the Bu. I do not have any experience with the Sebring so I will not comment on how it may compare. I have 10K on my Bu and other then a mild base rattle from the rear dash the car has been great. That reminds me I need to look for that rattle... Don't really think about it until I am driving with the base elevated. I was not overly impressed with the two tone interiors of the LTZ and I really did not like the suede in LTs so I was happy to find a LTZ with black on black leather. Hope this is helpful...