I have the answer for you.

BR800 FIRM mattress with tempurpedic topper.

Here's the reasoning:

1. The beautyrest 800 is a pocketed coil mattress. That means the mattress supports your body with separate coils that act independently so every part of your body gets the support it needs.
2. The tempurpedic topper adds an extra layer of cushioning and support that fine tunes to your body's shape. The best part about this is that the topper can be replaced and the mattress is still good. Unless you weigh 500 lb this will last you forever.