What is an excellent power cable?

To Xenon,

I see you have a budget of $500.00. Some of these power cords will be more than that obviously. I have been experimenting with a few in your price range: Anti-Cable, Audio Art, Shunyata Alpha Series (excellent cable), and lately Audioquest Storm Series Hurricanes (pricey). 

One thing to consider is the connector itself. Audio Art offers Furutech connectors on most of their PC's and I noticed a huge difference with the FI-28 Rhodium connector. Now, if you want to stretch your budget a little bit, the Audioquest Storm Series Thunder starts at $625.00.

If it's anything like my Hurricanes...Get ready for a mind blower.   

Try Mojo Audio power cords.

Distribution was indicated, and it’s important. It’s the beginning of the process to feed your equipment. 

You can begin by buying 1 cable and a good distribution outlet. These can also be picked up on the used market saving you money. 

From there go to the preamp then amps, then source as resources allow. One note: consider something with star grounding, it’s in the upper range category below and significantly helps define resolution 

Upper end:

Nordost, Ansuz, Shunyata

Middle end:

PS Audio, Furman 

Has anyone here used the Maze Audio power cords, Audio Power Cables
I have been using their  Ref4 Krell power cords for years on all of my equipment and they really open up the sound and give your system a really black noise floor, they generally take me about 75 to 100 hours to burn in but after that you can really tell the difference over stock cables, and the prices won't leave you broke.

I can't recommend any audioquest power cords..they don't improve sound in my opinion.nordost are nice but can be a little on the bright side not to mention big $$$$. Had great success with oyaide tunami and it's well within your budget. .really like elrod a bit over budget but you can find some used and bargain the price down. .best of luck.