Yesterday I replaced the cord for my Lumin T2 with one on those stupidly cheap (non knockoff!) 5N OCC pure silver PCs from Aliexpress. Think it was ~$60 for a 1.5m length. Low and behold, this new silver PC sounds different. It sounds more immediate and quick and with a bit more treble extension. It's kind of impressive actually. Makes me wonder how far it can go, or if I've already hit diminishing returns. Of course my brain might just be playing tricks on me, but I'm rolling with it, and the sounds seems to be staying constant. Pretty impressive bias I'd say! I'd say try it and give it a shot, with a good return policy (or cheap price) you have little to lose.
