Hi WearyMattress,
Post #13 here includes more information about the most important parts of the “value” of a mattress purchase which will give you a brief outline of the most important criteria to look for when you purchase a mattress.
There is also more information in post #2 here about the different ways to choose a mattress (online or local) that can help you reduce the risk involved in each of them.
These two posts can help you eliminate most of the risk involved in buying a mattress.
The Reverie mattresses (also see this topic and this topic) also have a similar type of design with “cylinders” and use very high quality materials that have no weak links in the design but they are latex cylinders rather than memory foam or polyfoam cylinders so they will have a completely different “feel” and response compared to the Dormeo mattresses.
If you follow all the steps in the tutorial post one at a time (and especially the information in the posts I linked in this reply) … then absolutely yes (and in lower budget ranges as well) 
The only one that I can see with a quick scan through the list would be the “mostly latex” mattress that is sold by Denver Mattress which has a separate topper which could be replaced.
The closest store to you that I know of that sells component mattresses would be the Natural Sleep Shop in Cranberry Twp.
Phoenix