Your closest Nordost retailer should be able to loan you a Valhalla 2 power cord to try in your system. If they don't have one available Nordost has loaner Valhalla 2 cables that they will send to your retailer for you to demo in your home. I've done that and it's the best way to hear if it right for your system.
Nordost Valhalla 2 Power Cord Worth It? Over Audioquest Hurricane?
I am wondering about the performance delta between the Nordost Valhalla 2 PC versus something more "reasonably priced" as the Audioquest Hurricane PC. Is there anyone with some experience with both of these cords able to comment on the sonic differences as you go up to the Valhalla 2? I'm certain the answer will depend what I am connecting the cords to. It will be one cord for a Gryphon Diablo 300 integrated amplifier, and another cord for an InnuOS Zenith MKIII music server. In other threads, I've seen some people note that a high-end PC with the Diablo won't yield much difference from the stock cable, but I'm not sure if that is true? I'd conduct some tests but I unfortunately don't have the gear quite yet, and I'm planning out the cabling.