About 2 months ago, I decided to upgrade the power cords on my two Bryston amps. I borrowed several high-end (read: expensive) power cords from a couple of audiophile friends. After doing some A-B testing, I couldn't hear much difference between a less expensive but good cord, and the megabuck products. Maybe it's my system, maybe it's my aging ears -- but my wife, who has great hearing, heard only marginal differences as well. Ultimately, I decided that it was not necessary to spend the king's ransom, and I bought a pair of slightly customized AudioQuest power cords from HCM Audio. HCM has a sale right now on both AudioQuest and AudioMagic power cords, with prices about 50% off. I ordered the AudioQuest AC15-1.6's with upgraded Hubbell plug, upgraded IEC plug, and two extra ferrites on each cord to control RF. I got both cords for less than $100 apiece, and think they are an excellent value. If you are uncertain about whether to make the plunge into costly power cords, you might want to check out HCM's products and prices. If you are not satisfied, you can sell the cords and upgrade to something more expensive. Please remember, however, that we are talking here about wire and connectors, not some form of black magic (as some of the subjectivists might want to believe). Here's HCM Audio's Web address: www.hcmaudio.com
When you get to their home page, click on the "Current Specials" link to see the power cord sales.