great thread topic, now I don't feel too bad about a partial hi-jack, after I toss in my experience of course.
I had 31x10.5 AT's for a year, and ya they were great on road, and never gave me trouble off road either. thats not to say they were great, and certainly wouldn't compare to MT's in the mud, but I went everywhere my buddy with 35" MT's went, just had to pick an easier line. He was rather impressed with them too.
Now here I am ready to replace my Dayton's, and I am torn between AT's and MT's for my next rubber. I am in Canada too, you may get a little more white stuff in your area, but we get our fair share here too.
I am specifically looking at 33x10.5 for this set, thats why I am leaning towards the AT's, they'll make a great on road tire, in the snow and such. Than grab a set of offroad tires in the spring if these don't perform as fantastic as I would like.
I am going to use Tirerack.com and ship to a shop on the border near my old mans place, total cost is gonna save quite a bit over what I can get locally, even with my discount.