Hi ResearchOverkill,
Thanks for taking the time to find out the “accurate” specs of the mattresses 
The specs you indicated would be at the lower end of the guidelines here (no more than about an inch or so of lower quality materials and a minimum of 1.5 lb polyfoam in a two sided mattress) and as long as that mattress was well inside the range that was suitable for you in terms of PPP (and not on the edge of being too soft) and you flipped and turned the mattress on a regular basis (see post #2 here) then there wouldn’t be any obvious weak links in any of the mattresses you listed and they would probably be a more durable choice than many other options you have available in a similar budget range.
The better options or possibilities I’m aware of in and around the Atlanta, GA area (subject to the guidelines here) are listed in post #2 here.
Phoenix