I bought a latex mattress several years ago, and will never buy another mattress. (Literally, they last 50+ years) Feels great, available in a range of firmness, no weird smells, never deforms, doesn't get hot, and naturally insect/mold resistant. I think I paid 1300 USD for a king size.

I know that's only tangentially relevant to the topic at hand, I'm just mentioning this since I had trouble finding much info on them. Latex is not promoted or advertised much, since they have very low markup compared to other mattresses; the store would much rather sell you a "hybrid" (usually 1/2 latex and 1/2 memory foam). But if you want to pay 2x as much to get something that lasts 4x as long, what you want is simple, boring, 100% natural latex.