Hi frankv33,
Other than Christeli and Select foam … some other manufacturers that use higher density memory foam in their mattresses that I can think of off the top of my head include …
AtlanticBeds
Original Mattress Factory
Sleep Science (although they are Chinese manufactured and like Tempurpedic aren’t CertiPUR certified)
There is also more about the most important parts of the “value” of a mattress purchase in post #13 here and while Tempurpedic isn’t typically what most people would call “good value” … value is also relative to how any mattress compares to the other mattresses they may also be considering or are available to them (or that they know about) based on suitability and PPP, the quality/durability of the materials, and all the other parts of their personal value equation that are most important to them so for a “few” people it may still be their “best value” choice even though for “most people” it probably wouldn’t be.
I would also keep in mind that the density of memory foam doesn’t necessarily relate to its firmness or how “supportive” it may be (see post #9 here and post #8 here) and since 5 lb memory foam is in the same general durability range as 7 or 8 lb memory foam (the durability benefits of higher density caps out at about 6 lbs or so) a mattress that uses a softer version of 4 or 5 lb memory foam over a firmer and more “supportive” version of 5 lb memory foam may also be worth considering.
[quote]So we looked back at our old bed to see if there was anything we could do with it. Turns out it is only 7-8 years old. A Stearns and Foster Plaza Ambassador. It’s base support layer is a 10" block of latex. I have no idea the density or ILD of it but we took the comfort layers we added fours ago off and laid down on it and it feels pretty firm.
(Here’s a link to the surgery we did in 2011 - pics link no longer works… www.whatsthebest-mattress.com/forum/re-p…-pics/17914-0-1.html)
Given that this 10" block was only about 7-8 years old we removed our comfort layers completely, flipped it, and put back our comfort layers and slept on it last night and my hammock was gone! Given this we are considering fine tuning the comfort layers but wanted to get your opinions on the longevity of our latex base. I understand this is impossible for you to say with any certanty not knowing what S&F used, but in general would a latex 10" block have a lifetime greater than 8 years? If we go down this path we could always replace the support later if we had to.[/quote]
I would say that the odds are high that it would still have some good life left in it yes. The old synthetic latex cores that Sealy used used several layers of latex that were just under 9" thick in total so I would keep it upside down so any softer sections (or sections that have softened) are on the bottom and build it up from there and I think it would probably be a good candidate for another round of mattress surgery. Post #2 here also has more information and guidelines about mattress surgery that may also be helpful.
Phoenix