Just happened to see this thread and figured I'd give Ethan a shoutout. I'm going through the "discovery" phase of how various cables affect my system and he's been great to work with. My first borrow was very heavy on Shunyata stuff, but the second one includes a lot of brands (all power cords) I'm hearing for the first time in my gear (Kimber, Cardas, Snake River...he recommended the Cardas Beyond Clear and it's been solid so far in my source).
No idea how much time and money I'd have wasted if I did this blind. I was leaning toward Shunyata Theta PC's, but since they are partially silver and my source and DAC (Chord DAVE) lean bright, that would have been a pain to sort out. So my goal for now is to "sweeten" my system without smothering the details.