last one was a turner... it was costly but I was unhappy with it after 8 months or so. Im not rich so cost is a concern but second to comfort
Bedding experts is a great value. American mattress will be inexpensive but not great comfort wise, and back to bed has a tiny bit of a boutique feel and they are more expensive.
Costco had mattresses at one point and those were actually very good.
No matter what, wait for a sale!! Its a huge price difference