My wife is a very light sleeper / insomniac. We want a very comfortable mattress. We have just bought a new bigger bedstead (super King) from sofas&stuff which has a sprung slatted base. We had thought that the artisan bespoke 4 with medium tension would be right for both of us. Would a zip and link mattress help to reduce transmission of movement. Does the fact that it is a sprung slatted base alter this decision? I am 73kg and 5 ft 8 and my wife is 63kg and 5ft 6.