Hi jrcarlisle,
I would be very cautious with mattresses that have a “thick soft top” because they can be risky both in terms of keeping you in good alignment and in terms of durability.
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets your criteria and the quality/value guidelines here … the better options or possibilities I’m aware of in and around the Hallsville, TX area are in the Tyler, TX list in post #2 here.
There are also some very good options available in the Dallas/ Ft Worth region in post #4 here that would be well worth considering but of course it’s farther away and would involve a longer drive.
Phoenix