Hi a2dox,
Thanks for the reminder that the OMF Serenity models also use higher density 8 lb memory foam.
While they aren’t available in all areas of the country … for those that are close enough to an OMF store they can certainly be a great quality/value choice.
The Sleep Science Escape here also uses 7 lb memory foam although it’s not CertiPUR certified or made in North America (there are some comments about it in post #2 here and post #2 here).
Phoenix