How are they in the mud on the mine when it starts raining or during breakup/melt off?
I've got the exact same truck and it came with those Pirelli. I was planning and replaced them and the 20" wheels with Wildpeaks in the first week. Although the Wildpeaks are tree peaks mountain rated it sounds that for your driving conditions "real" snow and ice tires, like the Blizzaks, would be the better option.