Don't kill me for saying this one....but I can notice more of a sound difference between cables (which doesn't say much) than I can between 192 and 320 bitrate files.
I know some people claim there's a huge discernable difference, I just don't hear it. Have plenty of music in FLAC / 320 / whatever, 192 sounds good enough to me.
If it works for you go for it.
Everyone does not have the same hearing acuity.