Hi Catatonic,
Before you consider a latex topper (or any topper for that matter) I would strongly encourage you to test similar materials in person (even if it’s just the top layer of a mattress that uses it) so you have some personal reference points about how latex “feels” and performs. While latex is a great material … like all materials it may not be everyone’s preference.
Post #2 here and post #8 here have some guidelines (and links to some of the better sources I’m aware of) that can help you make the best possible topper choice using your experience on your current mattress and any testing you have done as a reference point.
Phoenix