Hi Bradley22942,
Thanks for the update and you are certainly doing some great research and asking the right questions.
As you probably know Arizona Premium is one of the members of this site which means that I think highly of them and that I believe that they compete well with the best in the industry in terms of their quality, value, service, knowledge, and transparency and their latex/pocket coil hybrid would certainly make a good quality/value choice that would be well worth considering.
Of course when you are buying a mattress online that you haven’t tested in person I would always make sure that you are comfortable with the options you have to exchange or return a mattress and any costs involved just in case your choice doesn’t turn out as well as you hoped for because the only way to know for certain whether any mattress will be a good “match” for you in terms of comfort, firmness, and PPP will be based on your own personal experience.
A tight fitting zip cover shouldn’t be an issue in terms of the looseness of the fabric although all covers will stretch a little and become a little looser over time. If for any reason it does become too loose over time then one of the advantages of a component mattress is that the cover can be removed and tightened or replaced without having to replace the entire mattress.
If by “loose” you mean the edge support of the mattress then the pocket coil they use has two rows of smaller diameter and firmer coils on the edge to provide good edge support so this shouldn’t be an issue either.
There are certainly many people who prefer latex/innerspring hybrids over other types of mattresses (see post #13 here and the posts it links to) but again the only way to know whether you are one of them would be based on your own personal experience. While it’s not a complete list … outside of any additional options that may be available to you locally some of the better innerspring/latex options I’m aware of (which includes Arizona Premium) are listed in post #2 here and the post it links to but if you wish to test any of them in person rather than ordering online you would need to check their websites or call them to see if any of them have a dealer close to you.
I’m looking forward to finding out what you end up deciding once the time comes to pull the trigger.
Phoenix