Power Cord Order of importance

Audio Envy cables have been getting a lot of interest lately. Relatively inexpensive but supposed to be exceptional! Do a search there is a decent amount of info out there. 
https://audioenvy.com/store/

I would start with the coffee pot.

I finally splurged into upgrading power cords.  Amp, preamp, CD player and dual subs. Went with Patrick Cullen cables, Gold series. Patrick is a super nice guy, he got them made in 3 weeks. They look great. My system already sounded so good,  improvements are subtle but getting more pronounced as hours add on. Couldn't tell you which one was the biggest improvement since I switched them all at the same time. Only reason I finally went there is Michael Fremer's take on them, he feels bad for ones who think PCs don't make any difference. He is right and so far his advice on various components have been dead on for me, such as the PS Audio stellar phono preamp. That was a significant step up. Now waiting for an AVA vision SLR preamp, final upgrade for a while... It's taken already 6 weeks for the custom build, with hopefully only two more weeks to go, here is to hoping my patience will be rewarded.

djones...I don't drink coffee but thanks for your well thought out comment

I agree with Inna - that it all depends ... useful eh? The answers are not usually what you might expect either! I have found that servers and streamers and dacs and clocks are best with a "light" touch. So do not just bung one in because it is supposed to be good on anything. I have found that for those items . that KLE and Crystal are favoured by me