Which mattress has a luxurious soft sink feel in the upper layer?

We are looking to purchase a king size mattress with a luxurious soft sink feel in the upper layer, not bouncy/springy. I am 5 foot 2 inches and my husband is 5 foot 7 inches. We both weigh 10 stone. Our maximum budget for the mattress is £3000. Which mattress from your range would you recommend?