Wish I had put more emphasis on cables earlier

And/Or, support a good local audio dealer who allows you to take take cables home and try them for 30 days. If not, find another dealer. It sure eliminates all the guessing and wonder.

Best thing I ever did long ago. With first hand experience the difference was undeniable. Once you hear the benefits and "know"when its better, be prepared to get the wallet out.

It is possible to have an unexciting result, especially if you are cheap about it, i.e. choose an inexpensive 14 AWG power cord. Put enough money into it to get a nice result. Try for at least 12 AWG, and buy two, not one. Changing two is almost always easily heard.  

This thread made me think ... I should contact The Cable Company tomorrow. If I'm ever put on life support machine, (one never know's) what is the best PC they can recommend. Maybe I'll have one ready.... Of course Power Cables matter!!

I second the suggestion to try Audio Envy.  I have had a good experience switching over to their cables from Cardas.  I don’t have much to compare their power cables to,  but their cords are more flexible than the other two brands I had.  In my installation I needed that flexibility, so hearing nothing untoward coming from their PC’s, I switched over all of mine. 

isochronism, perhaps you should carry that PC with you in a sachel. You never know when you’ll need it! ;) Me? I'm ready to die; no problem.  :)