I am about 130 pounds, and my spouse is about 240 pounds. What do you recommend?

From a physics perspective, your spouse will generate more force on the mattress than you will. Usually a heavier person will want a thicker, firmer mattress. The main thing with a bigger person is to ensure that there is enough material so he or she doesn’t “bottom out” (meaning, feel the foundation or the bottom of the bed). The only way for a big person to get some pressure relief with our mattress is to have 9” or more of natural latex, as in the Organic Serenity or the Organic Serenity Pillowtop. That way s/he can feel the soft cushioning on top and the firm support underneath.