Sounds like a nice truck. One major thing that steered me away from the Ford 6.7L was the CP4 high pressure fuel pump. Although the failures seem to be less than they once were they are still occurring. The pump self destructs sending metal shrapnel through the entire fuel system trashing it. This repair is north of $10k and Ford is well known for denying warranty claims on this repair with the excuse of contaminated fuel leaving the owner holding the bag to pay the bill.
You will get people saying it's extremely rare which is not true. Visit any of the Ford 6.7L forums and you will read several cases of this issue on each one.
If you don't plan on keeping the truck a long time it may not be an issue for you. Good luck and keep us posted!