Hi Bruce Wayne,
The better options or possibilities I’m aware of in and around Birmingham, AL (subject to making sure that any mattress you are considering meets the quality/value guidelines here) are listed in post #57 here.
If you are in reasonable driving distance I think highly of Tom and Royal Bedding in terms of their knowledge and service and the quality/value of their mattresses and I would certainly make a point of including them in your research.
Phoenix