I did 1.5m for mine. I remember reading somewhere—and it’s been posted here; might have been a Steve Nugent piece—that there is something to be said for that extra length.
I like my Geistnote, but I’m not running them at the moment. I also like the Van Damme BNC cables I ordered from Design-A-Cable in the UK. But I am not running them either. Right now, I am running the BJC BNC cables, because those are the last I tried. I plan to do exactly what Pete suggested in a different thread after a few more weeks: swap them out for the Geistnote, and see if I really had/have an improvement or not. So far, all three sets have produced excellent, almost indistinguishable results. Now, perhaps when I demo the Shunyata Alpha and/or Sigma, the scales will fall from my ears. Maybe.
I am not sure who has acknowledged that the Geistnote are better than the stock; has anyone at dCS said that? I don’t know if they are better than stock, because I never even took the stock out of the box. Personally, I take dCS’s general statement—that their cables are “commercial grade,” and that audiophile cables are not included with their components, because they anticipate people are going to swap them out anyway—as also silently including the phrase no matter what we include. It also relieves them of any responsibility for a third-party’s QC. And if I’ve picked up anything here from the dCS staff, it is that they sound skeptical of some of the cable claims out there. But I’ve also read at least a post or two claiming that dCS uses MIT cables, but I have yet to see that confirmed.
Anyway, the great thing about cables is . . . well, I am not sure I know what the great thing about cables is. Sometimes, they’re a real PITA.