I got the Xtherm last year. If you camp in the snow, I would get that one. It is lite and the R value is very high. In fact I think the r value of the xtherm is higher than by previous therma rest air pad and foam pad combined. I stopped using a closed cell foam pad in addition to my airpad for 1 or 2 night snow trips. Its plenty warm all by itself. It has proven to be durable so far. I have been using it regularly for the past year in the desert, cascades, sierra and only had one incident where it blew away at night in the desert while sleeping on a tarp. It flew off and landed in a creosote bush, but surprisingly only got one small hole, which was easily patched with the kit. They are ridiculously expensive, but i had some gift cards to burn like you. When you consider the weight savings of not having to bring an extra foam pad when snow camping, its worth it.