Interesting topic.
I PURELY bought a rebreather to reduce the possibility of another episode of DCS. I unfortunately had 2 minor bends in 2004 on air within a 6 month period and hence bought a Sports Kiss to dive on higher 02 concentrations.
If anyone is interested I wrote an article on my DCS issues here:
http://www.daveharasti.com/articles/copingwithbends.htm
I now have over 100 dives on the Sports Kiss with no reoccurence of my shoulder/arm bend... I dive my SK generally on 1.3 and follow air tables which increases my safety margin.
It is a wierd situation that has no explanations so I've learnt to live with it by diving on a CCR.