Joe, For 3 season comfort on rocky terrain, I use the MontBell 180cm inflatable mattress; for softer ground, the MB UL mattress and pillow. The 120cm version is lighter, wider, longer, and cheaper than the torsolite you considered waiting for. Just a thought.
Pair it with a GossamerGear Thinlight for the lightest inflatable/solid mattress pairing.
Or consider their 180 Camp, at 1.5 inches thick.
I was not aware of the POE Uberlight, at 10 ounces(!). Certainly lighter, and also smaller at about 630 square inches compared to 700 square inches for the 90cm MB pad. The concept with the MB pads is to toggle the pad to your pillow and sit pad to make a full length pad. If you don't want/need that, the Uberlight looks amazing.