The Dynamo is so much better. I use it for my Synchro-Mesh and it made a big difference.
To power the OR5 I am using one of Paul Hynes largest PSU´s in this weight-class, the SR7 EHD-12.
It´s at least four times the size of the Dynamo and it rocks. Though, I beleive Steve´s Dynamo PSU has the best price/performance value.
Thanks for the feedback!