Hi txmj,
I switched your post to your own thread so they don’t get confused 
Brooklyn Bedding (the manufacturer of the Dreamfoam line) is a member of this site and like all the members here I believe they are among the best quality and value in the country.
The Total latex mattress and the Eurotop are an apples to oranges comparison and the choice would be a matter of your own preferences and budget and what I call your own personal value equation which is all the things involved in any mattress purchase that are most important to you. You can see some of my thoughts about the difference between a latex/polyfoam hybrid (the Eurotop) and an all latex mattress (the Total Latex Mattress) in post #2 here. They also have an “in between” version where the top two layers are latex (and both can be customized) on their own site here.
I think your idea of testing any material you are unfamiliar with locally first is a very good one and I would always suggest it before making an online purchase of a material or type of mattress that you are not familiar with. I would also make sure you talk with them on the phone because they will be your best source of information about their own mattresses and all the differences between them.
You’ve probably seen this but some of the options you have in the Austin area for latex (and other materials) are listed in post #2 here.
Phoenix