Would you kindly let us know your experiences with each of the 3 cables and provide any comparisons you can? That would be really awesome
A2A where I tried and bought my H6 were actually using the V-Moda cable on their demo pair, and they were heavily unbalanced between left and right drivers, so not sure if that cable was faulty.
So far (touch wood) my B&O cable is working well. I've had these babies on my head since I bought them and have never felt discomfort. The sound is still blowing my mind and I find myself listening to them much more than any speakers in my house.
If everything goes to plan, I hope to check out some higher end open backs and compare them to them H6s on Friday when I go back to A2A to feed my addiction