Hi scottschluter,
Yes … this is one of the many links in post #1 here which is the best place to start your research and has all the basic information, steps, and guidelines that you will need to make the best possible decision.
I’m not sure where you are in Southern Massachusetts but Worley would certainly be one of your better options if you are in reasonable driving distance. A forum search on Worley (you can just click this) will bring up much more information about them and their knowledge and service as well.
Post #2 here also includes links to the lists of better options I’m aware of in your general area with some links to posts and threads that also include some feedback about some of them.
The durability and longevity of a mattress is relative to the person and depends on many factors including the quality of the materials in it and the suitability of a mattress for your needs and preferences. It has little to do with the price you pay (a $3000 mattress for example may only last a specific person for 6 months in some cases and a $1000 mattress could last the same person for many years). Some of the factors that determine the durability or useful life of a mattress are discussed in post #4 here and the other posts it links to.
This can certainly be a good option if you are able to test the specific combination of mattress and topper together. It can be a little more risky or tricky if you need to purchase them separately because the choice of the most suitable topper for a specific person and mattress can be almost as difficult as the choice of mattress that doesn’t need a topper in the first place. In some cases a mattress that has layers that can be exchanged when necessary either for comfort or the top layer softens or breaks down faster than the rest can also be a good option. There are also some manufactures that can change out a comfort layer for a reasonable cost when the top layer has softened and led to the loss of comfort and support but the deeper layers are still fine.
There are certainly mattresses that have a pillowtop made of latex or other higher quality materials that aren’t as subject to breaking down as most mainstream pillowtop mattresses that use lower quality materials (usually low density polyfoam) that will soften or break down much more quickly. Higher density polyfoam or memory foam or microcoils or latex are all examples of higher quality materials that are much more durable than the typical lower density polyfoam that is very common in mainstream mattresses (with or without a pillowtop).
I would suggest “resetting” your mattress search and starting again with a new perspective based on some of the information here (in the “read first” post particularly) so that you don’t make the very common mistake of buying based on frustration which can lead to a costly replacement much too quickly.
Phoenix