Another vote for Sleep Number,but I was lucky to buy it from a couple downsizing their home.She wasn't happy to sell her One yr old SN......they gave me the receipt, & we saved 2/3rds the retail price!
My DH could sleep on a floor,so it was my choice.We love it.Our DD has had hers for 16 yrs.....it's like new.
Personally,I think mattress shopping is a nightmare.JMO