My current mattress was purchased from Franklins bedside Manor. It is a Silverdale 1700 hand tied nested pocket spring, hand tufted with comfort filling inc cashmere & silk. The mattress is on a quality wooden sprung base bedstead with a mattress protector. Although i was told it would feel quite firm on my base it is incredibly uncomfortable to the point that i feel it is giving me pressure sores. My weight generally varies between 10-11 stone & although i need support i also want something that feels soft underneath my joints so i don't feel sore. I have been looking at your Origins Comfort & Origins Pocket 1500 range as i am on a budget but have a couple of concerns. Firstly they seem much deeper than my current mattress so worried my fitted sheets won't fit especially if i also need a mattress topper as well & also slightly worried that the polyester top may make me sweat. Any advise & what would you recommend?