Hi sleepymath,
All of the mattresses you are considering use high quality and durable materials and there are no lower quality materials or weak links in any of them.
While I don’t make specific suggestions or recommendations … there is more about the 3 most important parts of “value” of a mattress purchase in post #13 here which can help you make more meaningful quality/value comparisons between mattresses in terms of suitability (how well you will sleep), durability (how long you will sleep well), and the overall value of a mattress compared to your other finalists based on suitability, durability, and all the other parts of your personal value equation that are most important to you, which of course would include the price.
There is also some really good information about the different ways to choose a suitable mattress (either locally or online) that is the best “match” for you in terms of comfort and PPP in post #2 here that can help you assess and minimize the risks of making a choice that doesn’t turn out as well as you hoped for once you actually sleep on your mattress in “real life”.
When you can’t test a mattress in person, then the most reliable source of guidance I’ll recommend is always a more detailed phone conversation with a knowledgeable and experienced manufacturer/retailer, as opposed to emailing or online charts. These manufacturers will have your best interests at heart and can help “talk you through” the specifics of their mattresses and the properties and “feel” of the materials they are using and the options they have available that may be the best “match” for you based on the information you provide them, any local testing you have done or mattresses you have slept on and liked or other mattresses you are considering that they are familiar with, and the “averages” of other customers that are similar to you. They will know more about “matching” their specific mattress designs to different body types, sleeping positions, and preferences (or to other mattresses that they are familiar with) than anyone else, and you can ask them for their rationale and ask for comparisons to the recommendations of other brands and why they might be recommending what they do within their particular lineup. At that time you can also inquire about the return/exchange policies of each company you are considering, just in case things don’t turn out as well as you would like.
Phoenix