Hi
We've only been posting on this site for a month or two and I don't want to sound like a broken record BUT we did invest about three months of dedicated and serious research both online and visiting all the area furniture/bed stores within about 30 miles of our house (we did buy a Chevy Vega new way back when and it was a fun little car - problem with the Vega and reason the disappeared so quickly is they all seemed to rust out quickly).
Spring Mattresses - ingenious invention but weight and gravity immediately begin to degrade the tension and support of springs from the first day you use it.
Foam - We tried in stores most every type of foam mattress available - laytex and memory foam and the amazingly expensive Tempur-pedic types.
We learned that the definition of "mattress comfort" is a very individual thing and no two people are the same.
Please allow me to ask if you have ever given consideration of trying a waterbed and waterbed mattress? After all of our research and spring and foam mattress testing we learned that our best choice was to stay with and buy a new waterbed mattress. We have been sleeping on and enjoying waterbed mattresses for 22 years but we have gotten older and wanted something a bit more firm and totally waveless.
The only two mattress types that are easily adjustable for firmness are air chamber types and waterbeds. Air mattresses are adjustable by adding or removing air but most of the online testimonials say that they don't hold their air/firmness constant and so adjustments must continuously be made. We have an air and innerspring combo mattress in our motor home and it is okay for that situation but I wouldn't want to sleep on it full time.
Waterbeds are ajustable by either adding or removing water but once the right firmness is found it won't change so once you find the exactly perfect firmness for you it is locked in. They also now come in dual or two sided configurations so one person can have a different firmness adjustment from their bedmate.
My wife and I are both side and tummy sleepers and once we found the right firmness we both now sleep thru the night without any pain at night and with no pain in the morning. The combination that worked best for us was a waveless and extra firm waterbed mattress combined with a Cloud9 three inch thick semi-firm memory foam topper. BTW - my bride sufferes from multiple back and bone conditions that will never go away and will slowly get worse over time and she has no pain and sleeps through each night.
We have had a beautiful oak waterbed/frame for all the 22yrs so buying a new mattress with all the latest design features cost only $300 (included shipping and no tax) and the topper was on sale at Amazon.com for $150 (included shipping and no tax) and all we had to do was add warm water, plug in the heater and we were all set.
Please take a look at new waterbed mattress technoly as the new models are NOT the bouncy full wave things we played on in the early 70s.
Price - Adjustability - Heated! We've learned you just can't beat a waterbed and it's about time they were put in the same category as other "regular" mattress types.
Best Wishes with you mattress quest!!
Jim and Cathy