Which is better, traditional full Cotton/ Wool vs sprung mattress

Traditional full Cotton/ Wool versus Spring mattresses - which is better? My back has taken a beating using Spring mattresses. As a result I have been spleeping on the floor (on a basic Futon) for the past month which I find much better than the spring mattress.
I am looking at buying a mattresses but am confused between the following two options -
(1) should a go for a good orthopaedic mattresses that is firm and has a spring count of 1000+
(2) should I buy the traditional full cotton/ wool mattresses (like futons) that have no springs. These have become rather uncommon, I had to struggle to find a few companies that still make them.
Any views ?