Cabling will NOT change the basic character of any cans. It's only a refinement.
Completely agree Dave, and I wasn't meaning to imply otherwise. However it is a 'tweak', a realtively (relative to what you can spend on a source component or an headphone amp that is) cheap way to change the sound, hopefully for the better. Some of us enjoy tweaking just for the fun of it; I know I am not the first to observe that this is a very male-dominated hobby .
Maybe your goal is to get your system to some optimum state and just kick back and enjoy the music? If so, great, but it certainly isn't mine. My system is a journey that I hope will never arrive at a final destination, I am enjoying the journey, tweaking and listening to great music all along the way.
I believe Matias has a Benchmark DAC 1 which is by all accounts a very happy place to be camped out on the diminishing returns curve. A significant improvement in either source or headphone amp from there is going to cost mucho dinero, at least compared to a replacement headphone cable. I found that swapping out the stock cable on the Sennies wrought a really substantial improvement (as did removing the sponges, which was free!). I certainly can't think of any other way I could have similarly improved on the sound of my system with those cans for anything like as little money. If you know different please let me know!