FWIW in my system, power cables on the DAC and Pre Amp made the most difference. That may be because my Pass Labs amp is already so good. After trying Audience, Shunyata and Audioquest PCs on it, the one that made the most difference was High Fidelity which seems to emphasize the XA25's strengths.
For those who moved on from the AQ Hurricane, what do you have now? I have AQ on most of my components but am wondering if that may be too much and whether another cable on my Bryston BDP-2 which I use to stream my be a good idea.