Just testing four HD560II headphones before I put them up for sale. The HD560II is a very good headphone. It has the same neutrality and transparency as the HD540II but the stereo imaging of the HD560II is a bit more withdrawn and distant than the HD540. Apart from this though, they're excellent and make the HD600/HD650 seem mediocre.
Very much agreed. Apart from the fact that my HD560s were the original version (Ovation), my experience with both models echo and reflect yours. And yes, they both make the HD600/650 seem mediocre in comparison!