I'd look at the Patrols, but whatever I lean towards would have to have 3T towing capacity, so the Hilux is out. Mazda is out because Mazda drivers are morons and I never want to lose that much brain capacity. Ford Ranger is a Ford, nuff said, won't be buying one of those. VW doesn't tow enough.
The Holden Colorado is (I think) at end-of-production. Isuzu DMax could be on the cards as long as their list of "luxury inclusions" doesn't end at "Driver and Passenger Seating (everyone else has to stand)".
I technically don't need a ute, but now that I have one, I can't imagine NOT having one.
But really, if I lost my Navara ... I'd bloody wait for another.