Hi Superwy,
The first suggestion I would have is to read the guidelines here which should help you avoid most of the traps and pitfalls of buying a mattress and the major brands and chain stores that sell mattresses with lower quality or “unknown” foam at prices that represent poor value (Such as the “S” brands like Sealy, Simmons, Serta, Stearns and Foster) and many other major brands that don’t want people to know what is in their mattress or make meaningful value comparisons with other brands. Your best quality and value is almost always with smaller local or regional or alternative manufacturers that sell either factory direct or through smaller more specialized sleep shops.
There are many of these options in Massachusetts and if you let me know which city you are in (or moving to) I’d be happy to look and see if I know of any that are within reasonable driving distance.
Some comments about Saatva are here.
Some comments about bedinabox are here (results of a forum search on bedinabox).
In the meantime … a few threads that may help (depending on where in Massachusetts you are) include here and here and here and here and here and here and here.
It’s quite likely that you have some very good choices near you that can give you both the value that is important and also have the knowledge and willingness to help you make the best possible choices.
Phoenix