Hybrid 7 suitable for tall overheating female?

Hi, i recently bought a Hypnos Cashmere king size mattress as a long term investment in my aching back and neck. However, I seem to be totally overheating and suffering night sweats which could be down to age but I'm not having as comfortable a sleep as I'd hoped. I love hotel beds with the sinking feeling and rest incredibly well in them. My partner is 6ft 14 stone and I'm 6ft and 13 stone but I do like to spread out on the bed, mostly on my side with knee up towards my chest and no pillow. Do you think the hybrid 7 you have in grade c would be suitable for me and my partner? Im going superking as my partner constantly complains about my sprawling out. many thanks in advance