I am in the market for a new GX 470. I test drove one at a local dealer, then researched the options at Lexus.com and other Internet sites. Most sites seem to indicate the options are really optional but the dealer is telling me a different story. I want a GX with the Nav system with backup camera and Mark Levinson Sound System and the KDSS Option but I do NOT want the 3rd row seat and/or Rear Seat Entertainment System. Dealer tells me I can't get it this way... can only get the Nav/Sound system WITH the 3rd row seating. What's the true story on this... can you order a GX the way you want it or NOT? I have ordered other cars in the past and was able to build them the way I wanted them. understanding that certain options require certain other options, etc. etc. but that is usually spelled out in the brochures or websites or ordering forms. I'm not getting that impression with the Lexus GX. All the sites I've reviewed so far list the 3rd row seating and the Rear Seat Entertainment System as OPTIONS and nothing I can find says if you want the Nav/Sound option you have to have those other options as well. What's the real story here?