Hi drderek.
I generally advise against the major brands such as Sealy/Stearns & Foster, Simmons, and Serta, as they all tend to use lower quality and less durable materials in their mattresses than most of their smaller competitors. This lower quality material will tend to soften or break down prematurely relative to the price you pay, which is why I would generally suggest avoiding all of them completely (along with the major retailers that focus on them as well) regardless of how they may feel in a showroom along with any mattress where you aren’t able to find out the type and quality/durability of the materials inside it (see the guidelines here along with post #3 here and post #12 here and post #404 here).
Phoenix