I guess that when I read "inflatable" I just lump them all together, as distinct from foam pads. Shows how far behind the newest technology I am! Self-inflatables still need a bit of human powered inflation. I see the big fat pads in the store, but since I mostly solo, or go with other old people who have even more old-school stuff (still using Kelty external frames), I have little exposure to the new fangled gear.

For me, "comfort" is relative. After being out a few days I adjust to whatever sleeping pad I have. I found that my aches and pains are due to over-exersion or just being out of shape and have little to do with what pad I sleep on. Realistically, I have plenty of aches and pains at home on a luxurious pillow-top mattress.

The critical function of a sleeping pad is warmth. I would never haul a 2 pound pad, no matter how comfortable.