There's one tire that many don't look at for excellent traction, and that is the BFG Trac Edge. I'm extremely happy with these tires, and they all run on my trucks during the winter. I've tried quite a few different brands and found the Trac Edge to work well for me. Many of the Crew Cabs (loggers) are running them around here year round, and as a matter of fact, that is how I first discovered them. I definitely agree with Stihl and Mudrunner... pizza cutters for the winter. Consider looking at the Trac Edge tires. They are reasonable too.
Here's my take on tire warranty. To me it doesn't make any sense whether your tire has the best warranty or not. Most tires nowadays do come with a repair and or replacement guarantee. But for the price I pay to have that guarantee on the way too over inflated Big O's compared to a BFG or Cooper, etc... that warranty ain't gonna help me spit if that tire goes out on me 50 km's up a trail head. I'm not trying to stir the pot, but I can't come to understand why I would pay so much more for a tire that doesn't really give me any more insurance over what I get on another brand.
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I've used up my sick days, so I'm calling in dead, and I'd like three funeral days along with my weekend off.