I used to have a pair of copperheads, a pair of diamondbacks, still have a Shunyata Python and Tiapan VX. My favorite power cord however is the Audience powerchord. I prefer it over the shunyata, it is a little more than the copperhead but well worth it. I do think that the copperhead is nice, a very nice step up from stock. I think that the Audience is exceptional. Give it a look as well.