Help selecting a power cord.

Start with a quality hospital grade or better wall outlet, followed by power distribution (Furutech eTP-66). No need in the beginning to purchase a power conditioner. Allow yourself the ability to evaluate the sound of the power cords you are considering. Work one variable at a time.
I replaced the cord on a Nuforce STA-200 and the difference was huge! I replaced the cord on by Pass XA-25.. went back to the original factory cord!
The Cable Company might be a good place to start.

People suggest DIY. You can try for sure but I can almost guarantee that you will not succeed. It is incredibly difficult to build a cable that sounds like a 1k cable from reputable brand like Shunyata. Cables that are much better cost way over 5k and you will notice the difference immediately. Read this and pay special attention to the last post.

http://forum.audiogon.com/discussions/extra-extra-millercarbon-proven-wrong-read-all-about-it-extra-e?highlight=millercarbon&page=6

You can spend arm and leg on the cable as well but it is not likely going to be better than the one made professionally. Check here

http://forum.audiogon.com/discussions/nova-power-cord-model-m101-silver-review#2180479

“Cables that are much better cost way over 5k and you will notice the difference immediately”

@begow,
I respectfully disagree with above statement. There are plenty of professionally made high quality power cords to choose from that can sound incredibly good under $1K. As with any aftermarket cable, the degree of improvement one hears is system dependent.

I’m using Audio Quest monsoon. Also running a Niagara 1200 power condition. Also running balanced inputs. No ground loops no noise.😎

As for which cable to replace first, buy one cable and move it around. See which component improves most. Buy a second cable and repeat.