We bought a Temperpedic a little under 2 years ago and it may have been the best money we ever spent. We both sleep so much better now and are not in the least bit sore when we wake up.
We paid a little over $7,000 for ours, but that isn't all the mattress. I think the king size mattress was just under $4,000. Then we also spent another $3,000 to get the bottom part where we can raise our head, feet or both and we can also make the bed vibrate (yes, I did say the bed can vibrate, go ahead and giggle). The mattress was worth every penny. Would I spend the extra money on the bottom part again, not sure. It is really nice to be able to raise up the top of the bed when watching tv and the vibrating part is relaxing, but not positive if that part was worth 3 grand.