I’ve been using an Audioquest Thunder power cord for the past couple of days. Cables really are about system matching...I tried the Shunyata Sigma power cord and I prefer the Audioquest Thunder in my system. One of my local stores let me have a home trial of their demo and I really like it. Unfortunately, the store is Bjorn's and they really aren't a "high-end" dealer. I don't have the opportunity to compare the Thunder, Tornado, and Hurricane to each other. Based on the very good results I have with the Thunder, I'm just taking a chance and going for the Hurricane to go from my amp to the power conditioner. I’m ordering a 2 meter Audioquest Hurricane on Monday.