Hi tbonecopper,
Post #13 here talks about the most important parts of the “value” of a mattress purchase.
I can’t speak to the parts that have to do with PPP or how a mattress “feels” to you since only your own testing can assess that part of “value” but if you can list the specifics of the materials and components of any mattress you are considering (see this article) I’d be happy to share my thoughts about the quality of the materials or help you identify any potential weak links in the design or construction.
Without this information there really isn’t any way to know the quality/durability of a mattress or to make any meaningful comments or comparisons with other mattress since the brand is just a name on a label and has little to do with the quality of the materials in a mattress.
Phoenix