Hi DJConnor,
Some of the better options and possibilities I’m aware of in the Norfolk area are listed in post #2 here.
All of the OMF stores carry the same mattresses and they all have access to the information you would need about the materials in their mattresses to make informed choices and meaningful comparisons so which store you visit wouldn’t really matter much. Reviews about any specific mattress also aren’t very meaningful or nearly as important as knowing the specifics of what’s inside it (see post #13 here about reviews).
Phoenix