I am another much in favour of Waterbeds, I have a degenerative disc disease in my lower spine which causes chronic back pain but my waterbed really does seem to help, I have had a waterbed for 15years + it is warm and very supportive with no lumps, I purchased a new one (Superking size softsided - brand new) online very recently, it was £799 full fitted and it is marvelous. The problem is if I go anywhere overnight I really miss my waterbed and take piles of Yoga mats to sleep on instead. I hope you find what you are looking for!