Hi Justo,
Thanks for taking the time to share your thoughts and write such a great post. Posts like yours put a huge smile on my face and a little glow in my heart, especially when I think back to the times that the forum first started and I would wait for days to have a post to answer 
The first part of your post stands alone and I certainly share the thoughts you expressed so I will comment on some of the questions and issues you raised in part 2.
I think the first post I would suggest reading is post #9 here about matching another mattress that you like. As you can see this is both an art and a science and there are several different ways that one mattress can match another (by feel, softness/support, quality of materials, or by design or a combination of some or all of these).
Post #12 here has a list of some of the better online memory foam sources I’m aware of and many of these are “matched” to the Tempurpedic or other major manufacturer lines in one or more ways. The “mattress matching” post will give you some insights that can help you ask better questions when you talk with them.
This is an interesting comment because the Tempurpedic Breeze mattresses use gel in the memory foam
You can read a little more about Tempurpedic and some of my thoughts about them in post #2 here.
One thing he did say that is somewhat accurate is that different types of memory foam (even of the same quality/durability) can have a different “feel” and foam properties and some people may prefer one over another. There is more about some of the different properties of memory foam that are independent of quality in post #9 here.
Based on the comments I’ve seen both from the manufacturer and customers this would be close but a little firmer than the Cloud Luxe and in between the Luxe and the Select. The quality of the materials are also not as high (but of course the cost is also lower). There is also no return on this mattress unlike the Cool Luxe.
I think the key to your “dilemma” is to look at the sites in the memory foam list and then talk to the ones that compare their mattresses to Tempurpedic in various ways and then look at the return policies that back them up. This way you can use your own best judgement as well as the information you receive on your calls and have the backup and low risk of a good return policy if for some reason you don’t feel that the mattress is a close enough match after you have broken it in (which is usually about 30 days or so).
I’m not sure where you are in South Florida but if you are in the Miami / Ft Lauderdale area then some of the better options in your area I’m aware of are listed in post #2 here including one of the members of the site listed on the memory foam list that makes mattresses that are designed to “match” the Tempurpedic lineup in several ways and they also carry the Tempurpedic lineup in their showroom so you can test them side by side in real time. You could also call some of the other nearby choices and ask them if they make any mattresses that “match” the Tempurpedics as well.
You certainly have some good quality and value options but of course you have a specific target that is just as important to you as well
I’m looking forward to your feedback along the way … and thanks again for your great post.
Phoenix