Hi CharlieVancouver,
I included a link to my last reply in this topic along with some additional information that would be relative to your higher weight range and the other questions you asked in my reply in your other topic here.
I would completely agree with this. The mattress you sleep on is one of the most important purchases you will make over the next 10 years or so and can have a bigger effect on your overall well being both waking and sleeping than almost any other purchase you make and it’s well worth the time and effort and research involved to make the best possible choice.
Phoenix