Hi Richard,
The first place I would begin your research is post #1 here which includes the basic information, steps, and guidelines that will be the most helpful.
The post I linked includes some guidelines for testing a mattress which can greatly improve your odds of making a suitable choice in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences). It also includes a link to some of the better online choices I’m aware of for those who are comfortable with the greater risk of making an online purchase. Careful and objective testing is the most reliable way to make the most suitable choice and when you purchase online then the experience of the manufacturer or retailer you are buying from and their ability to help you make a suitable choice along with the ability to exchange either a mattress or individual layers if you make a choice that is less than ideal would become an important part of your personal value equation.
Both of these have very thick and soft comfort layers and for most people would be quite risky in terms of alignment … especially for back sleepers. Of course it would depend on your body type, sleeping style, sensitivities, physiology, and preferences and only your own testing or experience can really know for certain but one of the most common mistakes in a mattress purchase is buying a mattress that is too soft and mistaking “showroom feel” for what is suitable for sleeping on over the long term. I would be very cautious before choosing a mattress that was this soft and make sure that it was keeping you in alignment in all your sleeping positions.
Pure Latex Bliss is owned by Latex International which manufacturers much of the Talalay latex used in mattresses made in North America. They are one of two latex manufacturers in the western world that makes Talalay latex. Talalay latex is a high quality material and since a mattress is only as good as the construction and materials inside it … by extension they are good quality mattresses. They are not usually in the best “value” range though and in many cases there will be smaller manufacturers that make mattresses that use the same materials with better value but this would vary depending on the store that is selling them. They have MAP pricing (which means the adbertised prices are controlled) but it’s often possible to get better prices in the store.
Some of the better options and possibilities in the Long Island area are listed in post #4 here.
Phoenix