Hi Jacalyker,
You can read more about the Pranasleep mattresses in post #3 here and in post #2 here and in post #3 here and a forum search on Prana (you can just click this) will also bring up more information and feedback about them as well.
Hopefully you’ve also had the chance to read the mattress shopping tutorial here which has all the basic information, steps, and guidelines that you will need to make the best possible choice … and know how and why to avoid the worst ones.
There is no such thing as the “best” latex mattress … only a latex mattress that is “best for you”. There is more about the most important parts of the value of a mattress purchase in post #13 here that can help you make more meaningful comparisons between mattresses and can help you decide which latex mattress would be “best for you”.
The tutorial post also includes a link to a list of the members of this site that sell mattresses online (in the optional online step) and many of these sell latex mattresses that use different types of latex with a wide range of designs, options, features, price ranges, and return and exchange policies which would all be well worth considering depending on the criteria that are most important to you and if you are comfortable with including online options in your research.
The better local options and possibilities I’m aware of in the Miami/Fort Lauderdale areas of south Florida (subject to the value guidelines I linked) are listed in post #2 here.
Phoenix