Yeah, I think upgrading the cable for some miracle frequency response improvement is one of the last reasons to upgrade a cable. I think it's more worth it if the stock cable sucks because of quality or length, hence why it's worth it for the 400i. I'm guilty of listening to the 400i for well over a year worth this terrible cable... eating my words. The other time I felt the need to replace a cable was for the Fidelio X1 due to quality. For some reason, the stock cable was veiled, but that had to be a special case. It's was uncanny. I think a coat hanger might have sounded better. When the cable was changed, the highs came back to normal, no contest. I have seen some nice eye candy cables so if that's a reason, I think it's as good as any. Like putting a spoiler on a car without one, haha.