Hi lisa3,
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.
SleepEz is one of the members of this site which means that I believe they compete well with the best in the industry.
The 6" natural latex mattress uses good quality materials but I would make some careful value comparisons with other latex mattresses that use the same amount and type of latex that may be in a lower budget range (including the Roma which has 7" of the same type and blend of latex … 100% natural Dunlop … although it has a different cover which is quilted with polyfoam instead of wool). NOTE ADDED: The Roma has since been reduced in price and now has two 3" layers of latex instead of a 3" and a 4" layer.
If you let me know the city or zip you live in I’d be happy to let you know of the better options or possibilities I’m aware of in your area.
Phoenix