Hi Sheba,
They are all good options that use high quality and durable materials and there are no weak links in any of them in terms of durability and of course all of the manufacturers are members here which means that I think highly of all of them.
There is more in post #13 here about the most important parts of the “value” of a mattress purchase but the most important part of your choice will be which one you believe will be the best match for you in terms of PPP. When you can’t test a mattress in person, then your more detailed conversations with each of them along with your own personal testing and experience on any mattresses you have tried that are similar will be the most part of your “confidence” that a mattress is a good match for you and if you are uncertain then the options you have after a purchase to “fine tune” the mattress and any return or exchange policies would also become a more important part of the “value” of your purchase.
In other words … your answer to the question of “how well will I sleep on this mattress” and the confidence that your answer is likely to be accurate (either before or after any fine tuning or exchanges that are available) is the most important (but not the only) part of its “value”.
There is more about the pros and cons of quilted covers vs a stretch knit cotton or viscose cover in general in post #12 here and more about wool quilting specifically in post #6 here.
You can see some thoughts about happy2ez (and some of the other names they have used) in post #6 here. I would be aware that if you look further in the listing you will see that the fiber is a wool polyester blend and it’s very likely that there are only very small amounts of wool for “label copy”.
The better sources I’m aware of for mattress covers are in the component post here.
I would read option #3 here and the posts it links to so that you have realistic expectations of the success of your initial choices and the trial and error process that may be involved. The most effective approach is a “spirit of adventure” where your experiences and the satisfaction that comes from the process itself is more important than any cost savings you may realize (which may or may not happen).
Phoenix