I have been towing various caravans around 1700/1800Kg all over Europe with a 1994 Landcruiser 4.2L VX which I have owned since new and all I can say is "brilliant".
My son has been towing his Abbey caravan and a trailer with 4 quad bikes (not at the same time!)with a Landcruiser Colorado for 3 years and just loves it. His Colorado does seem to get through front brake pads a lot quicket than my VX but I put this down to his being automatic and mine manual.