Hi Jon P,
I’m glad you found us.
As you can read in post #1 here and some of the information, steps, and guidelines it links to … choosing a mattress that has lower quality or unknown quality materials in the top layers (which includes most major brands) can feel great in a showroom but can be a risky choice in terms of medium or longer term durability as the lower quality foams that they tend to use in the upper layers of a one sided mattress will soften more quickly than higher quality materials. Unfortunately … the loss of comfort and support that comes from foam softening isn’t covered by a warranty so warranties don’t offer any protection against this (see post #174 here).
While I can’t tell you specifically what is best in your circumstances … I can tell you that I would avoid purchasing any mattress where I didn’t know the quality of all the materials inside it (which would mean avoiding many of the major brands).
Phoenix