Hi Amity,
I’m not sure why you are thinking that the mattress is "gimmicky because this is a fairly typical construction for an innerspring mattress and if the foams are US made then they would almost certainly be CertiPUR certified which would be “safe enough” for most people but the specs you listed are missing the layer thicknesses which are important so that you can confirm that there isn’t more than “about an inch or so” of lower quality materials in the mattress and so you can confirm that the thickness of the layers adds up to the thickness of the mattress and make sure that all the layers are included.
Arizona Premium’s latex/pocket coil hybrid is certainly a good quality/value choice that would be well worth considering and there are no lower quality materials or weak links in the mattress. As you probably know they are also a member here which means that I think highly of them and I believe that they compete well with the best in the industry in terms of their quality, value, service, knowledge, and transparency. Of course if you decide to go in this direction I would make sure that you talk with them on the phone about the thickness and firmness of the latex comfort layers that would have the best chance of success.
Outside of any local options that may be available to you … some of the better sources for innerspring/latex mattresses (including pocket coils) that I’m aware of are listed in post #2 here. Sleepworks and Sleep Design (which sells Berkeley Ergonomics mattresses) also use high quality materials and there are no lower quality materials or weak links in their mattresses either.
There is also more about innerspring/latex hybrids vs all latex mattresses in post #13 here and the other posts it links to.
These are both “all latex” mattresses which are different from latex/innerspring hybrids and since latex is a more costly material they will also be in a higher budget range. Flobeds is also a member of this site that I think highly of and they also have a component latex mattress that is somewhat unique that includes customizable zones in addition to customizable layers.
The mattress shopping tutorial also includes a link to a list of the members here that sell mattresses online and many of them also sell latex and latex hybrid mattresses that use different types and blends of latex that have a wide range of different designs, options, features, return and exchange policies, and prices that that would be well worth considering as well. Post #3 here also includes a list of the ones that sell component latex mattresses and many of these are very similar to Savvy Rest except they are in much lower budget ranges.
Phoenix