broke down and bought an Exped Downmat UL7. Still don't have it, but looking at a cold climate trip in fall, I wasn't going to bring two foam pads, and a single isn't really that comfy nor warm. So I went all luxury with the latest and lightest winter pad.
Will report back how it works in the Sierra after I return in October. I was looking at the Neoair Xtherm as well, but I couldn't find it at a decent price, plus some reviews mention that it is quite a noisy pad. The Exped UL pump design is pretty genious for their new models and saves weight, while keeping moisture out of the pad.
