Hi jbldr,
The first place I would start your mattress 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 the worst ones.
The best way to compare the quality and value of a mattress is based on its construction and the quality of the materials that are inside it.
Do you mean there is a “nice high ridge” ridge in the platform bed?
The Telluride uses good quality materials and has no obvious weak links in the mattress but it would also depend on how well it matched your body weight and sleeping style because it’s on the soft side which can also affect durability. There is more about the factors that can affect durability and the useful life of a mattress in post #4 here. Latex is much more durable than 1.8 lb polyfoam (which is at the bottom end of what I would consider to be a good quality material in a one sided mattress but of course it would also depend on the specific design of the mattress and on your body type/weight and sleeping style)
I would certainly avoid the mainstream mattresses they also sell.
Phoenix