Just got the women's version of the REI AirRail… (6 oz shorter, and I'm 5'8, so saved an ounce)
http://www.rei.com/product/857477/rei-airrail-15-self-inflating-pad-womens
It's 25 oz, so not really ultralight, but seeing as my new pack is 16oz, my new tent is 16oz, and my sleeping bag is 18oz, I'd sacrifice a little weight and go for comfort. I feel a sleeping pad is one area where I'm ok getting a slightly heavier item, so I can wake up refreshed.
I was looking at the Exped Synmat UL7, as well as the Thermarest Prolite, but they both felt too narrow. I think I've resolved that 20" is just not wide enough for me. I always feel like I'm falling off them. Gonna sell my Xtherm.
I'll let you know how it works out. Anyone else have one?

