Hi Jack ate,
I would base a topper choice if you need it on your personal experience on the mattress and using the topper guidelines in post #2 here and the posts it links to.
I would avoid ātheorizingā about what you need until you have actually slept on the mattress for a couple of weeks because your actual experience and knowing the ādegree of changeā you need will be a more accurate way to make a choice.
Phoenix