I would be very cautious with pressure testing systems and mattress firmness ratings which are very subjective and can vary widely between manufacturers. I would put more trust in careful and objective testing than pressure testing or firmness “numbers” that aren’t consistent between manufacturers. Lighter weights also tend to need softer mattresses because they don’t sink into the comfort layers as easily so what feels soft for you may feel firmer for her. There is more about choosing a mattress for couples that may have different needs and preferences in the first part of post #2 here. I would also agree that the Natura mattresses aren’t in the best value range compared to other similar mattresses but the “value” of a mattress purchase will also depend on the parts of your personal value equation that are most important to you.
I think you were probably wise to pass and I wouldn’t consider any mattress where you can’t find out exactly what is in the mattress (see this article) so you can identify any weak links in the mattress (see post #4 here) and make meaningful comparisons with other mattresses.
There are also some very good online latex options that are listed in the tutorial post that may also be worth considering.
Just for clarity … I don’t “recommend” Jordans and I think there are better options in the area … they are just one of the “possibilities” in the area but they wouldn’t be my first choice unless there was a compelling reason to buy there. For most people they wouldn’t be in the same value range as some of the others in the Boston list.
I would keep in mind that firmness levels are very subjective and not consistent between manufacturers. There are also different types of firmness that can affect how different people “rate” a mattress (see post #15 here). There is more about “matching” one mattress to another one in post #9 here but when you are comparing mattresses that have a different design or use different materials then your own testing is the only reliable way to know how closely one mattress may match another one for you in terms of PPP.
A forum search on each of the sellers will bring up more information about most of them and there are also some links to posts and threads with feedback about some of them in post #2 here.
They can meet you outside of their normal business hours if you make an appointment (see their contact page here) and I think it would be well worth your time to pay them a visit