Hi lindroid,
The better options I’m aware of in and around Concord are included in the San Francisco list at the end of post #2 here (including one right in Concord itself that I think highly of).
this would vary depending on what each manufacturer called “extra firm” (which may not be consistent) and on the perceptions of each person. Latex itself in all it’s versions comes from very firm to very soft (and there are as many people who would say that latex itself is firmer than “regular” mattresses as there would be people who are convinced the other way around but it all depends on the specifics of the materials in each mattress because any material can be either soft or firm. Latex is certainly more elastic and “shape conforming” than polyfoam and for some people this may “translate” into feeling softer. If I knew the ILD’s and type of latex in the layers of the mattresses you tested then I would have a better idea of what you consider to be soft or firm relative to others but your “rating” may be very different from someone else’s “rating”.
It depends on which of their models you choose and on the layer choices you make. They have blended Talalay, 100% natural Talalay, and 100% natural Dunlop available.
Phoenix