Hi acump,
IMO, the most important part of choosing a memory foam (or any other) mattress is the ability to find out the quality and type of foam that is inside it. Without this information there is no way to make meaningful comparisons with any other mattress. Post #10 here includes some guidelines that I think are good to follow when choosing a memory foam mattress. Without filling in the missing information about the foams used in the Supreme Elegance … I personally wouldn’t consider it.
I also believe that in most cases the best quality and value in a mattress is found with local manufacturers who sell factory direct or smaller sleep shops who carry “alternative” brands (smaller national, regional, or local manufacturers). Here too though, knowing what is in your mattress and the ability and willingness of the outlet to tell you this information is a major part of choosing which outlet I would put my focus on and is one of the key ways to identify better outlets.
Some of the factory direct outlets in your area that I would include in my research are in post #2 here.
Feel free to keep the questions coming as you come across them.
Phoenix