I know some love them or hate them - but waterbeds have come a long way.

you can get full flow, 60, 75,80,90 or even 100% wave reduction

lumbar support

memory foam top

frame or frameless

washable

If allergies to dust mites ?? a waterbed would be a better choice I think too.
If interested here's some waterbed links -
http://www.google.com/search?hl=en&q...ds&btnG=Search