After 4 RXs, I needed a change. Voila the GX. It is roomy, comfortable, sufficiently powerful, and beautifully finished. Only cars with the 3rd row seat were available, but I would rather skip that expense and get a cargo cover instead. The seats are stored, taking up room in my garage. After owning 10 Lexuses, I am surprised at some of the features missing from this car, e.g. HID swiveling headlamps and in-dash CD player. The RX is a much better equipped model for much less money.
Ride height, navigation, Mark Levinson stereo, side-opening rear door, and the exterior design.
Better gas mileage, HID headlights that swivel, coin holder in the console, more comfortable center armrests, 2nd row seats that fold flat rather than stack against the 1st row, in-dash CD player instead of in the glovebox, and cooled front seats.