Hi LynnNM,
I would second that you read the two articles that Coventry linked before you spend any more time trying to research any more mainstream mattresses or shopping in chain stores such as Mattress Firm (where there isn’t a single mattress I would buy by the way).
A mattress is only as good as the materials in it and shopping somewhere that can’t or won’t give you this information or shopping based on "fake sales) is a recipe for a poor quality and value mattress.
You can read a little more about the Optimum line in post #48 here but like all the major brand mattresses … I would tend to avoid any mattress where you can’t find out the quality of the materials in it or mattresses sold on “marketing stories” and techniques. It would be like buying a piece of furniture that had a nice veneer over particle board that was selling at “real wood prices” or where the manufacturer of the furniture wouldn’t tell you what the furniture was really made of.
As Coventry also mentioned … if you can provide the city you live or your zip code I’d be happy to let you know of any better manufacturers or retail stores in your area I know of.
Phoenix