Osteo is a good idea, but also consider a physiotherapist/sports massage. I was a regular user of the osteopath due to weights/surfing/cycling, and I have an imbalance in the muscles in my back - the right side is stronger and tighter than the left, mainly due to an old injury. It got to the point where the osteopath would correct the spine's alignment, but within a week the muscles would pull it back out again. A friend recommended a local physio/sports massage guy - he loosened off the knotted muscle and stopped the muscles from pulling the spine back out of line and advised me on extra stretches and exercise to keep supple. I still need osteo occasionally, but nothing like as much as I used to. I see the physio dude about once every two months just to get any potential problems addressed. Working out fine now and pretty much pain free most of the time. (The guys's dad is a bass-player too, so he knows what can happen after a few close gigs.)
So... osteopath is good, but do consider a physio as a possible extra.