About to order a pair of these, and the website says to order a 1/2 size up? I've been wearing the Lowa Tibets in the same size as my normal shoes. Also, I heard the Bighorns are wider than the Tibets - are they significantly wider? Reason I'm going with the Bighorns over the Tibets is the insulation. I would try them on, but there's not a store nearby that carries them - Thanks.