I am 6 ft, 175 lbs, and a back sleeper. I started with the Casper Wave Hybrid. It was much too firm and I woke up with pain in my hips every morning. Moving to the Nova Hybrid was much better. It had a good amount of foam softness and still gave support in the band at the hip area of the mattress. In the store, the Wave felt better and softer than the one I got, but what I didn't account for was all the people and their varying sizes that were on the mattress before me to soften it up.