Traded in '02 X5 for fully loaded GX '06. The ride is very quiet and smooth. The X5 doesn't even compare. Also test drove RR Sport and Aviator. The Lexus was the hands down winner. I highly recommend the sports package. Makes the interior a lot more attractive. Couldn't be happier with my choice. A GREAT vehicle.
sport package, navigation, back up camera, quietness of ride