I'll throw this out for ya, but I have been talking to Discount Tire Direct here, and they said for a truck like the ones we drive, and the terrain I use mine in (mostly a road queen with snow and ice) the new Nitto Dura Grappler is a great choice.
They have over 80k on there showcase truck (F350 dually) and the tread is at about 50%
These are what I'm getting after I save the money up, before fall
PS and that Discount tire truck is ALWAYS hooked to a trailer