Me too. I've found that the self-inflating pads just aren't thick enough--not enough give in the middle. Even the thickest don't do it for me. The Exped DownMat (even the 7cm one) was a revelation for me. Not quite as comfortable but still adequate in the summer (and much lighter than the DownMat) is the NeoAir.
Also, I've found that it's very worthwhile carrying a pillow. I use the Cocoon inflatable one that weighs 70 grams, but it's not very warm in winter, and I haven't found a solution to that problem yet. It'd work okay to put between your knees to relieve back strain while you sleep, but something wider such as a sit-pad might work better for that.
I'm a US 11.5 men's, A or B width. I have some Darn Tough socks (micro crew, boot socks, in-town), and they fit exceptionally well, but I don't have trouble with most other socks so your foot might be narrower than mine. Icebreaker's Hike Mid socks seem perhaps a little narrower, so you might investigate a pair of them as well. On the bright side, you'll make a lifetime friend if you try a pair and have to give it away :)
Does the hood stow out of the wind? If I put it away wet, will it drip down the back of my neck?