Marilynn, we went from a king waterbed to a California king "zero gravity" bed system. It's a gel-foam top and we just LOVE it. It's soooo comfortable. In order for each of us to have our own "adjustment" control, we had to go with the Calif. king. If we'd have gotten a Queen, there would have only been one adjustment, which would not have worked. The whole outfit cost us 3 grand, but it's the best $$ we've spent on something like that. I still liked the waterbed (it had baffles), but it was giving the Spousal Unit backaches and I just got tired of listening to him rag about it. In all fairness, I should say that we had the waterbed for 30 years.
We bought this locally, didn't go to a big box store in the larger city. This place sells used and new appliances, plus beds. I bought my pre-owned washer from them and it's running great.