Your system sounds excellent. I want to push back to say that the next bang-for-the-buck purchase for your system may not be power cables for your downstream gear. Consider placing a reclocker between your streamer and DAC. Upgrade the PC into the Node if you haven't already. And if you're running ethernet into the streamer, consider placing power supplies on your modem and router, if you haven't done so already. For streaming, I've found that the modem and router are part of the chain.
I used the iFi power components because they were most affordable. In my experience, I added those LPS's over time, and can say that the sound went from raw to refined when I replaced the streamer PSU. The modem was slight, but it added resolution and body. Then the router PSU changed the sound from edgy/fatiguing to relaxed. Best