Hi JDMWDC,
Once you are down to final choices and you know all the pros and cons of each then it’s time for me to step out of the way so you can decide which is the best value for you and which mattress is the best fit for your own criteria. For example if the ability to exchange a layer isn’t an important issue for you and you are comfortable with the risk involved in buying a mattress where this isn’t possible then that feature of the purchase wouldn’t have “value” to you even though it may be the most important reason that someone else chooses it. the same thing would hold true for having wool in the comfort layer.
You will find that in most cases the “value” of a manufacturer’s line is comparable across their lineup (except that margins are usually a little higher in their higher budget mattresses) so the differences between them would be based more on the pros and cons of each design and the differences in materials and components which are most important to each person. Any of them would generally be “worth the extra price” but that’s different from whether any of the options available as you go up the line would be “worth it” to you.
Phoenix