Hi Lumpy,
The first place I would start your research is the mattress shopping tutorial here which has all the basic information, steps, and guidelines that will help you make the best possible choice … and know how and why to avoid the worst ones.
Unfortunately you are the only one who can feel what you feel on a mattress and there are too many unknowns, variables, and personal preferences involved for anyone to be able to know which mattress would be best for you based on either specs (yours or a mattress) or theory at a distance (see mattress firmness/comfort levels in post #2 here). There would be no reason for anyone to try and “sell” you a mattress no matter how they feel about their own mattress because a mattress that is “perfect” for one person may be completely unsuitable for someone else to sleep on.
I would also be very cautious about using mattress reviews (positive or negative) as a reliable source of mattress research or information and in many cases they can be much more misleading than helpful (see post #13 here).
There is more in post #2 here about the most (and least) effective ways to choose a mattress (online or locally) and how to identify and minimize the risks involved in each of them.
Phoenix