Hi jdhr,
The first place I would start your research is the tutorial post here which has all the basic information, steps, and guidelines that can help you make the best possible choices and make more meaningful comparisons between mattresses. I would also take what most mattress salespeople in the mainstream market (unlike factory direct manufacturers or some of the better retailers) tell you with a grain of salt.
Post #3 here and the adjustable bed thread it links to has more information about adjustable beds and some good sources that you can use as a “value reference” because there is no need to test a specific base in person so you can buy an adjustable bed anywhere.
You can read more about some of the pros and cons of a latex/polyfoam hybrid vs an all latex mattress in post #2 here.
Latex Bliss mattresses use high quality materials (Talalay latex) and they are certainly “better than average” quaity/value compared to most mainstream mattresses but they are also in a higher budget range than many other all latex mattresses that use the same materials that are available in the market. They also make latex hybrid mattresses.
You can read more about glued vs unglued latex layers in post #2 here. As you can see … latex is “sticky” and doesn’t generally have an issue with shifting.
If you follow the steps in the tutorial post one at a time you will have the best possible chance of “connecting” with a knowledgeable and experienced retailer that will give you accurate information, puts your best interests above their own, and helps you make a great choice based on your own personal value equation and the criteria (including your budget) that are most important to you.
Phoenix