I agree about the Big Agnes. I do a lot of backpacking, and have never slept really well. I've tried 1" self-inflating pads, 1.5", 1" w/ closed cell foam below it... Big Agnes has by far been the best. I'm also kinda OCD about weight - my last trip my whole pack was ~16 pounds before food. After a ton of research and trying a bunch of different things, I stuck w/ the Big Agnes.
I'm also thrifty/a cheapskate, but a good pad and good sleep is worth it to me.
Someone mentioned it being slick, and you have 2" to fall off of, which are both things I have noticed, but I'd still recommend the pad.