I've had XLO Reference 3 (both interconnect and single wire speaker cable)in my system since this morning. I see you are getting Signature (better stuff!). Did you also audition the Reference series?
Yesterday, a did a home demo of Shunyata Venom, Diamondback, and Hydra 4. With everything I have read, I was expecting to love it all. Not the case. Especially with the Hydra power conditioner, each power cable changed the overall sound in non-subtle ways. One day was not long enough to settle in and get used to the various combinations. A/B comparisons (late at night) drove me crazy! To my surprise, I actually prefered the less expensive Venom to the Diamondback in some ways. It could just be my system, but I found the Diamondback tended to smooth things out a bit too much, especially in the upper registers.