Just to follow up, I would be very interested in hearing experiences with the Purple. My Tempurpedic isn't providing enough support after only 2 years - and Tempupedic refuses to honor their own warranty!

I was also considering something like the Tuft & Needle. The Tuft & Needle is about 1/4 the cost of the Tempurpedic, so I could actually just replace it every year or so if necessary.