I test drove most of the sedans priced between 45 and 50K. To me, the Lexus GS 300 drove the smoothest. I was impressed with its acceleration, fuel economy, ride and the responsive steering. My GS 300 is loaded. Something I did not plan on... but am totally satisfied with it.
Audio, instrument cluster, lighting, six speed auto/shift trans., seating comfort and ride.
Make the front grills all the same design. The DC accessory outlet is in the bottom rear of the front center storage compartment. It is awkward to connect an accessory power cord and then close the cover.