Power Cables

For amps, I have used all iterations and generations of PS Audio cables. Currently running AC-12 and love it. (I'm using all Shunyata for my front end). 

I don't know much about electrical engineering, but keeping it simple with high quality copper of a decent gage has served me well on amps. 

If I may suggest a power cord that has literally transformed my system to greatest levels. Clean, dead silent, alive, life-like. I cannot stress if anyone should try these power cords will not be able to take them out....they are that good........anyone??

bacardi, I would like to know.

Core Power Technologies. These are seriously amazing power cords. I think once you try these in your system your jaw will drop in amazement. You WILL keep them in your system. They have a 50, 150, 300 model. 

Thanks for all the ideas (esp the Mcintosh owners).  I have an MC275 with OEM power cord and looking to upgrade.  Any other thoughts on a good $300-$500 power cable?  Anyone think a certain brand of power cable would influence tube amps or is power=power?  I've decided if I'm spending this kind of money on a system that I am going to ABX test in-home.  I recently did this at a store and compared interconnects at $100 and $450 and speakers at $9K and $16K.  Got it "wrong" on both (not truly wrong - I'm old enough to know I like what I like.  Interesting, but a little-dated article where a well-designed ABX study with a solid n showed 49% got the "correct" answer when looking at Valhalla from Nordost ~$4,000 against some <$100.  Love to hear the counter argument.  This article does give a rationale behind audiophiles vs. non-audiophiles not being able to pick up difference.  This reads like a NEJM study:...http://hometheaterhifi.com/volume_11_4/feature-article-blind-test-power-cords-12-2004.html