Hi BckyLTylr,
The better options or possibilities I’m aware of in and around the Houston area (subject to making sure that any mattress you are considering meets the quality/value guidelines I linked in my last reply) are listed in post #2 here.
I’m assuming that you are referring to the simplified choice mattress topic which includes more details of the Sedona Sleep mattress and many of the other simplified choice mattresses as well (in post #2 of the topic). If you are considering online options then the tutorial also includes several other links to lists of many of the better online options I’m aware of (in the optional online step) outside of the “simplified choice” mattresses as well.
The iComfort is a memory foam mattress and memory foam and latex are very different materials with very different properties. There is more about the differences between them in post #2 here but the best way to know which type of materials or which type of mattresses you tend to prefer (at least in general terms) will be based on your own careful testing and personal experience on a range of different types of mattresses.
The Sedona Sleep mattress certainly uses high quality materials and there are no lower quality materials or weak links that would compromise the durability or useful life of the mattress. Similar to other component mattresses (or a firmer base mattress with a softer topper) as you mentioned it would have the advantage of being able to replace a single layer if one of the layers softens or breaks down before the others (usually the softer top layer) or if your needs or preferences change down the road without having to replace the entire mattress.
If you know that you like the “feel” of latex it would certainly be well worth considering.
Phoenix