I am currently using stock power cords and am ready to move into 'audiophile' cords.
My suggestion is to try different companies and their different level of cords. A specific cord on your CD Player may/will sound different when it is used on a power amp, Pre Amp, etc. More costly does not always equate to better sound.
Try many cords in your rig and not just one. Something cheaper like a Shunyata Venom 3 to try out as you can purchase many of them to install and not break the bank.
Find a dealer who is willing to let you try out many cords in your rig. If you cannot find one locally, then buying used or online is the next option. The Cable Company has a way to try out cables and they will also recommend some.
Buying used from the 'Gon is a great place as you can usually sell them off for the same price you paid for them if you do not like them.
I tried a bunch and have settle on the Shunyata and DH Labs cords for my rig and my preferences, but like I stated in the beginning, try out as many different companies as you can. It is fun, but time consuming, to try out different cables in your setup (IC's, Speaker, Power, etc.)
Do you also use Power Conditioning in your rig? Something else to consider.