No, you're not overthinking. Tempurpedics aren't all they're cracked up to be. We got a natural latex mattress several years ago and will never go back to any other bed. It consists of 3 latex layers, soft, medium, and firm. They can be stacked in any order you want to make the support firmer of softer. It helps a lot if you and your spouse need different support since the queen and king beds have 2 stacks of latex. They are in a casing that is cotton. The best part is there is no off-gassing. I don't do well with that, so it was nice to sleep in a new bed without feeling the chemicals effects the next morning. Ours had a slight vanilla scent.
I think they're much more comfortable than Temperpedic, plus they spring back when you get out of bed, instead of leaving and imprint. It's a cooler bed too. It's much better than a spring mattress, with no pressure points.
I got a wool blanket and comforter, so moisture escapes so you don't feel clammy. We got a wool topper also.
The down side is that they're expensive, but should out last any other mattress for a long as long as you take care of them. Some stores have financing available. This is the brand we got,
www.savvyrest.com/ There was a store that sold them here, so we got to try them before we bought one.
Can you tell I like our bed? LOL I forgot to mention that I had lower back pain for a long time before we got our bed and after just one night on it, my back pain was gone. We had a spring mattress before.