Hi SideSleeper42,
You can see the details of the layers and components of the Ava Luxury firm here and the Hope luxury firm here (click overview). As you can see from the guidelines here both of them have weak links in their design in terms of durability but the Ava has 5" of lower quality or questionable materials in the top layers and the Hope has only 2 1/4" of lower quality or questionable materials in the top layers so it would be better than the Ava (although I would normally avoid both of them).
While the Hope is a little over the edge of the guidelines I would normally suggest (no more that “about an inch or so” of lower quality or unknown materials in the upper layers of a mattress) … a mattress with a little over 2" of low quality materials may be about as good as you will find there but I would be very hesitant to spend more than your credit on a mattress that is questionable in terms of durability because there may be some lower cost options available to you that may be worth considering that also have thinner layers of lower quality materials in the comfort layers.
Latex is a high quality and very durable material so if it’s a good match for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) on the mattress you end up exchanging for then it would certainly make a good choice. A good topper will also extend the life of a mattress underneath it.
Phoenix