Mbadsc1, obviously others here like the Elrod EPS-3S cords also. They are the best I've heard on amps/preamps/power conditioners. The Shunyata's really have some magic in the digital domain though, and outperform the Elrod's on digital devices, IMHO. I have heard power cords from MIT/Transparent/Tara Labs/Cardas/XLO, etc., and I think a Shunyata would top them all. I personally liked the King Cobra's performance over the Anaconda Vx, but your tastes may vary. I prefer analog to digital. If I must listen to digital, I like tubes in the path and Shunyata power cords, to smooth out the digital glare. When Shunyata's first King Cobra came out, it was very rich, warm and musical. Many loved it, but the critics claimed that it lacked dynamics. So Shunyata came out with the King Cobra V2, which was more dynamic, less lush. Some folks still complained, so they came out with the Anaconda Vx, which is even more dynamic, yet leaner (for a Shunyata). All Shunyata 'noise reduction' series cords rob dynamics to some extent, which is why I don't care for them on my amps. However, they do have some *magic* when used for digital applications.
Generally speaking the King Cobra V1 will provide the warmest, richest, lusher sound. The Anaconda Vx will be more dynamic and quicker. The KC V2 falling somewhere in between these two. All will sound very good when used with the appropriate equipment, and suiting varying musical tastes.
Only you know what you're looking for so only you will ultimately know which cord you prefer. These are just starter tips. If you buy used on AudiogoN and find a certain cord doesn't suit you, you can usually turn around and sell it without much loss. If buying new, you may want to try The Cable Company, and it's lending library.
I hope this was somewhat helpful.
John