I would like to buy a good quality mattress.Latex? I am 5'2" , 10.5 st, sleep on my side and back and suffer from fibromyalgia. My husband is 5'7" 10.7 st sleeps on his side and has to get up in the night to work. We have a sprung divan base , sleigh style - bought recently . It is in two halves so supported down the centre. Advice on the best mattress please.