"I'll stick with Ford products..."
You WILL be sticking with a Ford product. As Ford and International continue merging, my understanding is that the DT466 motor will become available in larger Ford trucks. And in case you couldn't tell, the same design team that did the Lincoln Navigator also did the new International styling.
I know Ford sold its big truck division to IH a while back ~ I haven't been keeping up on all the mergers, design teams, etc. :)