Hi jalula,
The “best” way to sort through the site quickly would be the tutorial post here which has all the basic information, steps, and guidelines you will need to make the best possible choice … and know how to avoid the worst ones.
The better options and possibilities I’m aware of within reasonable driving distance from you are listed in post #2 here (Connecticut) and in post #2 here (New York City region). You have some good options available to you.
You can see some of my thoughts and an analysis of Saatva in post #1 here. They are not what I would consider a “green” mattress which would normally focus on more natural or recyclable materials such as innersprings, latex, and natural fibers.
There is more about “how green is green?” in post #4 here.
The only two ways I know to choose the mattress that is the best “match” for you in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) is careful and objective testing using the testing guidelines in the tutorial post if you are looking at a local purchase or a more detailed conversation about your specific needs and preferences with an online provider if you can’t test the mattress before a purchase (see mattress firmness/comfort levels in post #2 here).
There is a little more in the first part of post #2 here about some of the options that can help a couple that have different body types, sleeping positions, or preferences.
Phoenix