Soft is best for hip pain as you need maximum pressure relief. You may check out Puffy, more specifically the Puffy Royal. This is where I sleep for the last 6 months and am really satisfied (ultra-plush). It is very soft, gentle and pressure-relieving on the back, shoulders and hips. I have chronic shoulder pain from years of weightlifting and it has helped considerably with pain management. The pressure relief and motion isolation are amazing, you'll never know that your partner has woken up in the middle of the night to go pee. It's also extremely quiet, hypoallergenic, fiberglass-free, doesn't smell, sleeps cool, etc.