Mattress Forum

My wife and I bought a Cal King Tempurpedic mattress 6 years ago.  I took some getting used to but seemed like we were sleeping well the last few years.  Lately we both wake up sore and I have back problems.  It seems that the mattress is too FIRM.  We both wake up with sore hips, back, ribs and shoulders.  I am 6'4" and weigh 210 lbs. and she is 5'9" and weighs 135 lbs. (she might kill me for that).  I'm a side sleeper and she is a side and back sleeper.  It seems as if the way to build a good mattress is to use correct layering.  Since we have a FIRM foundation, would a softer latex topper make us more comfortable?  I hate to get rid of the tempur mattress because it is still in great condition and we have a lot of money invested in it (can you really invest money in a mattress?  seems like a poor choice of words).  If a topper would help, what thickness and ILD would we need to look at?  Also, store recommendations would be greatly appreciated.  Thanks for you time!