We bought an all latex foam mattress about 10 years ago online from Sleep EZ. A decade in, it really has been great. You mentioned not liking all foam, but this has been so much better than an inner spring mattress. It doesn't move or bounce around and we don't have any of that memory foam, so there's no squish to it. Just consistent, comfortable support throughout. We have a king, so we could have customized the two sides with different levels of firmness (still could if we wanted to swap some layers) but the default has been good for back or side sleeping. There's also been no breakdown or indentation of the mattress, so I honestly think we'll get at least another 10 years out of it. My wife is one to tear through and destroy consumer goods (clothes, sofas, tables, appliances, cars, etc.) so it really is impressive that this mattress is going strong after a decade in our house.