If you haven't decided yet I would also have a good look at the Hankook ATM. Since you're in Calgary, the extra sipping is a bonus in winter, I was very happy with them on my old truck and are my top contender right now as my current truck needs new boots also...
Another underdog is the Hercules Terra Trac AT II, made by Cooper but also has a little extra sipping, good warranty and very reasonably priced.
Hankook ATMHercules Terra Trac AT IISo after a better read, if you dont need a winter tire maybe a good commercial tire for highway might be in order for a F350...