He sleeps any which way and I am a side sleeper. Which mattress?

Hi,
I am 8 stone 5 and my husband is 16 stone. He sleeps any which way (back, side and front) whereas I am a side sleeper. We currently have a budget sprung mattress and I am desperate for a good nights sleep due to the creaking and motion whenever my husband shifts in bed! I have heard that latex may be the best for motion transfer but welcome your input!