Hi ajd6c8,
Just in case you haven’t read it yet … the first place I would start your research is the mattress shopping tutorial here which has all the basic information, steps, and guidelines about “how” to choose a mattress that is the best choice for you.
I don’t make specific recommendations because there are too many unknowns, variables, and personal preferences involved for anyone to use a formula or “theory at a distance” to recommend a specific mattress for someone else out of all the many thousands of options that are available in the market (see mattress firmness/comfort levels in post #2 here) so while I can’t tell you which specific mattress to choose … I can certainly help with “how” to choose and if you follow the steps in the tutorial post one by one you will have the best possible chance of choosing a mattress that is the best match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) and all the other parts of your personal value equation that are most important to you.
SleepEz is one of the members here which means that I think very highly of them and they compete well with the best in the industry. They are very knowledgeable, experienced, and helpful on the phone and if your first conversation had horrible reception I would call them back to discuss which of their options would likely be best for you. They (or any online manufacturer) will be the best source of guidance about their own mattresses when you can’t test them in person and they are in the best position to help you with the options they have available and help you “match” their different options to your body type and sleeping positions than anyone else.
All of their mattresses are certainly good quality/value and there are no “weak links” in any of them so it’s really a matter of deciding which of them would be the best “match” for you based on a more detailed phone conversation where you can provide them with more details about you, the mattresses you have tested or are used to sleeping on, your preferences, and the criteria that are most important to you.
Phoenix