Hi memoryfoamoverlord,
The first place I would start with any mattress search is post #1 here which will provide you with the basic information, steps, and guidelines you will need to make good and informed choices.
As you will read … a mattress is only as good as it’s construction and materials and memory foam can be anything from cheap junk to very high quality. The key is to know how to tell the difference and to focus on “value” instead of just price.
Post #4 here has more information about Dynasty.
Dreamfoam and Brooklyn Bedding (who manufactures them) is a member of this site and like the other members here I consider them to be among the best quality and value in the country.
Phoenix