So I've been doing research on water vs air beds... I emailed a large number of bedding outlets on the net and have received over a dozen responses thus far. The conclusion? There isn't one. Nobody agrees on anything. I focused on outlets that sold primarily water & air beds (no traditional mattresses). Some insist that waterbeds are really good for your back and airbeds are horrible. Others are the opposite. I think this is really going to boil down to personal comfort here. For everyone who says a waterbed hurt their back, there's someone else who says they solved their back problems. We're just going to have to lay down on a few of these beds and decide for ourselves.