I was browsing through tutorials and came across one on creating a spine setup using clusters. I figured it maybe exactly what I need and gave it a try. The rough test I did was quite effective and I liked the movement it gave me so I have decided it will be part of the final rig. Below in the picture you can see the 5 clusters I have created using the spans on the spline curve. This was made really simply, using an IK spline handle, from which I select the spline curve and create clusters. I created about 5 as I felt that would be more than enough for the fluid movement I was after.
The tutorial link is HERE . It is by Javier Solsona. I used one of his tutorials on reverse footlock on the Joe rig I am working on.