Hi Tiredshopper55,
This certainly isn’t an unusual comment about a memory foam mattress and temperature issues and motion restriction are two of the biggest complaints about memory foam.
[quote]So I’m thinking of buying a 3" or 4" latex topper to replace it.
Would Medium-Firm 4" be a good idea if I’m 6’4" & weight 235 ibs, a side sleeper who toss & turns at night? Or would a 3" firm be better?
I DON’T want to sink too much, but I DON’T want to feel like I’m sleeping on a rock.[/quote]
Unfortunately you are the only one that can feel what you feel on a mattress/topper combination and there are too many unknowns, variables, and personal preferences involved for anyone to be able to predict or make a specific suggestion about which topper would be the best “match” for both you and the mattress you are using it on in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) based on specs (either yours or a mattress) or “theory at a distance” that can possibly be more accurate than your own personal testing or sleeping experience (see mattress firmness/comfort levels in post #2 here). The specifics of the mattress under the topper can also make a significant difference in which topper will work best for any specific person since every layer and component in a mattress/topper combination will affect the feel and performance of every other layer and the “sleeping system” as a whole.
While it’s not possible to make specific suggestions because of all the many variables involved that are unique to each person and your own experience is the only way to know for certain whether any mattress/topper combination will be a good “match” for you in terms of PPP … there is more information about choosing a topper in post #2 here and the topper guidelines it links to that can help you use your sleeping experience as a reference point and guideline to help you choose the type, thickness, and firmness for a topper that has the least possible risk and the best chance for success. It also includes a link to a list of some of the better online sources for toppers I’m aware of as well.
[quote]Would a Talalay (softer feel) be better than Dunlop (firmer feel) if I go with the firmer ILD?
I couldn’t find any Talalay 4" toppers anywhere.[/quote]
Both Talalay and Dunlop come in a wide range of firmness levels but the choice between them would be a preference choice rather than a “better/worse” choice and either one in a suitable thickness and firmness level can make a good choice. Some people just prefer the feel and response one type of latex and some prefer the other. There is more about the differences between them in post #7 here but the most reliable way to know which type of latex you tend to prefer would be based on your own local testing or personal experience.
Phoenix