Mattress suitability for us

Hi, my wife and I are looking to replace our present mattress which is a king size kaymed pocket sprung mattress on a sprung divan drawer base. I am 6'3" and 16st, my wife is 5'9" and 10st. We recently slept on one of your zip and link origins reflex 1000 mattresses and enjoyed the experience although I would say that the weekend also involved a fair amount of alcohol so I'm not sure about the validity of those feelings! We aren't too worried about synthetic/natural but do want a mattress that's comfortable and appropriate. Thanks in advance.