Sweet truck. I really like the new Fords and have seen them take some serious punishement without any problems. Keep it maintained and she'll run for a long time.
As far as the bed liner, I have a truck now that has a spray in liner. It was on it when I bought the truck and there was no documentation from the dealer, so I do not know the manufacture. The liner has done a fair job at protecting the bed, but not from sharp impacts or heavy objects like a drop in liner. In spots that have dented due to impact, the liner has started to break and peel away. I've tried to repair it with various materials (including the do-it-yourself liner materials), but it hasn't worked.
Another thing about my spray in liner is that things that you don't want to slide, will slide. Heavy things that you need to slide, won't.
The quality of the name branded and warrantied liners must be much better than the one I have, so if you go that route, make sure you use the quality products.