I think I would like a Medium (my weight 95 kg) Artisan Naturals super king zip and link, and although there is not many comments anout the zip and noticing it etc..I feel it might annoy me after a while. That Latex Topper sounds so nice I would like that, and was going to go for a pocket sprung Artisan base. However I am wondering if that will make the overall feeling too soft. My wife is 55kg and says she is not bothered by getting different spring tension on either side of the mattres, and we both like a firm mattress anyway. So I was wondering if I was going for the topper maybe a slightly harder flat divan base would be appropriate ? Also can you tell me if the topper just slides on top of the mattress - is there anything fixing it to the mattress otherwise will it not just slip off eventually ?ThanksB