Now that the purchase has been made, I'd vote 33x10.50s - the narrower tire digs into the snow to find hard surface a little better, it seemed and for a DD there's a few pounds less wear-and-tear on the ends of the axle that way. Plus, with 15x7" rims with 4" backspacing they tucked in pretty nicely on a 4.5" lift. I'm still looking for my front 3/4 shot so in the meantime this one will have to do: