Hi transposon,
You are fortunate because you have some great options in your area including some very good factory direct manufacturers.
They are listed in post #2 here and some links to comments and feedback about some of them are in post #2 here.
You certainly have many options to test different materials and combinations and have some good quality/value choices available locally as well 
The Sealy Embody uses what is called “Smart Latex” which is a mostly synthetic Dunlop latex blend which is less costly and less durable than higher quality latex. It also uses interlocking “inserts” of other materials in the latex so it has softer and firmer areas and would not be “typical” of the feel of other latex mattresses that use a higher quality latex (either Dunlop or talalay without the fabricated layers. It would also tend to be firmer than many latex mattresses although latex comes in a wide range of firmness and softness levels in both Dunlop and Talalay so firmness and softness would vary with each mattress.
Phoenix