I am C-5 level quadriplegic. My current mattress options cause way too much back pain and overall discomfort. I got a PressureGuard Easy Air LR air mattress a while back when I developed a pressure sore on my bottom. It feels like I'm sleeping on a slab of concrete for some reason. I then got a Tempur-pedic mattress pad for the top of it and it is too soft (I know, I'm Goldilocks). So now I am really only looking for a new mattress because I already have a hospital bed frame from years back. I was wondering what other beds people find comfortable that are also good for pressure relief? I should also note that I like the hospital bed frame because it has rails.