Hi Csj0952,
There is some more information about some of the basic differences in innerspring units in this article. I’m not sure where you’ve read that the mashall spring unit is superior to the Lura-Flex Symetrics used in the Jamestown mattress, as they can both be good quality and durable products, each with their own unique characteristics (as outlined in the article I linked to earlier in this paragraph).
No, the LFK spring unit in the Jamestown is not low quality, and the innerspring unit in a mattress is rarely the “weak link” to begin with. Regarding foam quality, yes, the Beautyrest line tends to use less dense foams (look at Jordans web site should you need some details), but I wouldn’t know the quality of the foams in the mattress you looked at from Jamestown as you didn’t provide that information, so I can’t comment upon that. I would always make sure that you find out the information listed here so you can compare the quality of the materials and components to the durability guidelines here to make sure there are no lower quality materials or weak links in a mattress that would be a cause for concern relative to the durability and useful life of a mattress before making any purchase.
A mattress is only as good as the construction and quality of the layers inside it and in the case of the Dr. Greene mattress of Serta and most major manufacturers they don’t disclose the quality of the materials and I would avoid any mattress (even for testing) where there is no way to know the quality of what you are considering. No matter how it feels in a showroom … low quality materials (especially in the upper layers) will soften and break down more rapidly and the loss of comfort and support that goes along with this can happen quite quickly (a few months to a few years) and isn’t covered by a warranty … even if you can no longer sleep on the mattress.
Most of the pressure mapping systems are specific to a certain line of mattress and aren’t really relevant to mattresses as a whole which have different constructions. They also only measure surface pressure (which you can often feel in your own personal testing) but don’t provide input into alignment or how the pressure is distributed in the deeper body tissues or include the differences in physiology between people (pressure affects different people differently). There are a few more comments in post #2 here and post #4 here about pressure mapping systems.
They can be a useful tool for stores that have them available and where the results can translate into the specific mattress you are most interested in but they wouldn’t be the primary way I would make a purchase decision or be that useful if the mattress you are buying is different from the one you tested and the testing results can’t be easily “translated” into a mattress with a different design.
In New York City, site members Dixie Foam Beds, Nest Bedding and Scott Jordan Furniture may be worth your consideration. Dormio Organic beds are located in Toronto if you are considering latex again. Those would be the site members listed for the areas you mentioned.
Aside from those businesses, I have discontinued the provision of listings of potential retailers in various geographic regions (unless they are already approved site members), because of the difficulty in maintaining such lists in a retail landscape that is constantly changing, and most importantly the confusion it was creating with the consumer members who incorrectly assumed that these businesses had indeed gone through the strict vetting and qualification process that is part of becoming an approved member of The Mattress Underground. Such an assumption is unfair to both the consumers seeking assistance, as well as the very businesses and manufacturers who have indeed qualified the be members here of The Mattress Underground.
You can perform a forum search on the areas you mentioned and see what other businesses have been discussed in that region on the forum which may be helpful to you.
Whatever business you’re considering, I would always confirm that any retailer or manufacturer that you wish to visit is completely transparent (see this article) and also make sure that any mattress that you are considering meets the quality/value guidelines here.
If you have any questions about specifications or certain products you discover, feel free to post back on the forum and I’ll do my best to be assistive.
Phoenix