|We did research for quite a while to find a mattress for my lower back pain. We settled on the TempurPedic with the foam pillows and I couldn't be happier with it. It really does adjust to your body and spreads your weight evenly.
The negative is the cost (about $3,000). but you get what you pay for. I would recommend it to anyone with back pain. I've never used the 4" memory foam covering you can get from retail stores, but others seem to be satisfied with them for much less money.