Hi olivetorpedo,
It’s always unfortunate when you end up with a poor salesperson … and unfortunately they are much too common in the industry. Had your salesperson been a little more helpful it may have been worthwhile testing the Bed Boss memory foam mattresses that they carry.
Finding the layering and design that is best for you will depend entirely on your careful and objective testing for PPP using the testing guidelines in the tutorial post. There are just too many unknowns, variables, and personal preferences involved for anyone to suggest a specific mattress for someone else using a formula or “theory at a distance” (see mattress firmness/comfort levels in post #2 here).
The quality of the materials is a different matter however because you can’t “feel” the quality of the materials when you test a mattress and it’s important to know the quality of the materials in any mattress you buy so you can identify any weak links and make more meaningful comparisons to other mattresses. The “quality” guidelines I would use are in post #4 here.
Phoenix