Hi robr,
Just out of curiosity … if you liked a “mostly latex” mattress I wondering why you ended up ordering a mattress with only 3" of latex (you can see some thoughts about an all latex mattress vs a latex/polyfoam hybrid in post #2 here).
While of course comfort and how a mattress feels is always subjective and unique to each person and has nothing to do with the quality of the materials … you may have been able to get closer to the “feel” of a “mostly latex” mattress like the Prana by choosing a mattress that contains more latex in the upper layers or is “all latex” itself or perhaps even by adding a topper.
You may also be able to change the “feel” of the mattress you have with a layer exchange as well.
Phoenix