I have a Select Comfort. The main reason I went with it over the others is because of the ability to adjust the firmness. Depending on how my back feels, I can either firm or soften the mattress so I am always comfortable. I have had this bed for eight years or so and still love it. I did have one problem and the customer service was excellent.

Select Comfort also has a line of temperature balance sheets and blankets. I don't know how they would work for you, but they do a good job keeping me cool in the summers here.