If you like your old bed and know the brand I would stick with that. That’s what my wife and I did when we moved to here. We bought the same brand and model that we had in our old home.

Another vote for Sleep Number for all of the reasons OBB posted. Expensive, but I fully expect it to last 20 years.

Only buy a mattress that offers a sleep trial—the longer, the better—so you can return it at the manufacturer's expense if you don't like it.

Mattress companies are notorious for putting on different labels for different chain stores so you cannot compare, my suggestion is to ask them how many springs does it have, how thick is the foam.
What's the return policy and what's the guarantee policy and only then can you compare apples to apples

We bought two bad mattresses down here, one from Babbettes and one from a mattress store. They became lumpy within 3 years and hurt my back. Be aware that the warranty for mattresses is often prorated and before stores honor it they set up appointments, measure the “topography “ of the mattress, and render a decision. Meanwhile, you are in agony. We went back to our trusted mattress source in Michigan : Michigan Discount Mattress near Farmington. They have a huge show room of many mattresses, and can custom to your desires. I wanted a firm one with coils and cooling materials. I had bought a mattress and box spr previously. They suggested one similar to a Dreamcloud with cooling. Perfect, so we ordered it. The king size was shipped in a box. We rolled it into the bedroom and placed the shrink wrapped mattress on top of our box spring. I cautiously cut the protective wrapper off, expecting a sudden expansion/explosion. It acted more like a Thermarest, slowly expanding and unrolling. The first night it was great. The second night it was fully expanded and even better. This was 5-6 years ago. I still can’t believe they can shrink up a king mattress with a coil layer. Don’t be afraid to try one of the newer mattresses shipped in a box.

Bought our last mattress several years ago through Costco.com. They had a good selection to choose from, at very competitive prices (it's Costco). Many with extensive reviews by customers. We picked one that we thought would work for us. They delivered and installed and carted off the old one. A polite crew did the delivery. Still happy with our choice.

Nectar is great!!! And they give you a 365 day full warranty. If you're unhappy anytime before that, you get a full refund. Look them up.

Original mattress factory. Near Spanish springs. We love ours.

Tempurpedic

Heh - how do you think it is I can remember the model number!

Original Mattress Factory in Orlando, good quality and lots of choices.

Our daughter got a dream cloud we tested it and it was very comfortable. Found out it was half the price. So we went with it.

Watch the shrink process.
https://www.youtube.com/watch?v=6ZDGDIrXepg