Hi Dangeresque55,
You are fortunate to live in the Boston area because there are some very good choices there. The better options and possibilities I’m aware of are listed in post #2 here.
The tutorial post here also includes links to two lists (in the optional online step) that include the better online options I’m aware of that will ship anywhere across the country and they include retailers and manufacturers that sell both memory foam and latex or latex hybrid mattresses.
Phoenix