I am currently using 64audio's premium balanced cable. For me it is better, than the standard 3.5mm cable, since it adds more air and openness to the sound. However, it is thinner, if it comes to bottom end. Not perfect, but still better than 3.5mm. I was cross listening for some time with an Ares II, but am not able to enjoy it that much, given the mudiness it adds to the lower end. I liked the 3.5 mm more in comparisn. Currently waiting for Plussound's Exo t-metal. Still searching, testing All said with reference to M15 modules. M20 reduces air and openness too much, for my taste, independently which cable I use.