Hi We currently have a bed base with sprung slats and an old mattress that's due for replacement. We are looking to replace both mattress and bed. We could do with some advice as to what the best mattress/base combination would be for us. I am around 5'9" and 12st 8lb and my wife is around 5'6" and 9st. We are looking for a king size bed. The key things that we are looking for are as follows:- No 'bounce' when one person turns over. We have tried various pocket sprung mattresses and found them to vary significantly in this regard. What should we look for in a mattress to reduce this to a minimum?- We would like a firm feel without too much padding that will 'settle'- Very important is a mattress that is cool. We have been put off memory foam mattresses completely because they all feel too hot. What should we look for in a mattress so that we will be cool?We are based in the south so unfortunately it is a bit far for us to visit your showroom. Any pointers would be much appreciated.Thanks