I can't vouch for the Hankoooks, but I can about the Cooper STTs. So far, it's the best tire I've ever purchased. Like you I had concerns in the rain/snow/ice and running a M/T tire. With the Coopers, those aren't a problem. The siping on the tires help tremendously in fowl weather. Also, road noise is almost equal to the BFG A/Ts I had on mine previously. Wear wise, I've run close to 5,500 miles on mine so far with no signs of wear. I hope to get close to 40k out of these tires because they're not that cheap.
If I had to buy another set of M/T tires tomorrow, I would, without a doubt, go buy the STTs again.
Hope that helps some. :cheers: