In the 30 years we've been together, my husband and I have tried all sorts of mattresses. Our 100%, all-time, fantastic favorite is our Select Comfort Sleep Number mattress. Love it. Love it. Love it.
We purchased our set on eBay because, if you've done any price research, they appear to be expensive. However, they're by far the best bargain in the world because it's the last mattress you will ever have to buy.
We have a queen-size set and, when the set is put together, they look EXACTLY like any other mattress and box spring. The beauty of this mattress is you NEVER have to turn it. Turning our queen mattress in the past was quite a challenge and cumbersome at best.
Before we got this mattress, I was having problems with morning or all-day backaches. Honest, after the first night on our Select Comfort the backache was gone. It hasn't returned. We've had our Select Comfort for over 5 years and wouldn't trade it for anything. My husband says it's the best mattress he's ever slept on.
Select Comfort makes pillow-top ones, too.
Guess you can tell we like it. Best wishes on your mattress hunt!