Hi tao20,
The first place I would start your research is the tutorial post here which has all the basic information, steps, and guidelines you will need to make the best possible choices … and avoid most of the worse ones (including both of the mattresses you mentioned).
The better options and possibilities I’m aware of that are closest to you are in the Chicago list in posts #2 and #4 here and in the Fort Wayne / South Bend list in post #4 here.
Phoenix