Which of these power cords ?

I always go into this topic with some level of skepticism.  However I think that a well designed/constructed cable should yield dividends over stock cables.  The cost/benefit ratio in my mind is non-linear and is dependent on the resolving power of your system/room acoustics and the subjective nature of your hearing (as well as your insane need to eek out every ounce of sound and surrender your paycheck).  For me the Pangea PCs are a definite improvement over the stock cords (a relatively inexpensive upgrade).  Recently I tried an Audioquest Monsoon PC and was pleasantly surprised at the improvement over the Pangea PC.  The Cable Company has a lending library (I think the cost goes toward the purchase of a new one) - they also sponsor usedcable.com which might be a reasonable alternative as well.

Excellent guidance and advice from @ggc   

Make your own ,
you can buy Furutech cable, iec and power plugs or
Cardas cable ( if you have a Hotpot ) with their iec and power plug .
Cardas has 9.5 guage cable for your amps and 11.5 for the rest of your power needs .

also agree ggc. Very many good options available, and you don't have to replace all 7 at once. You can try some cords essentially for free, so give it a listen...

Seriously? Another power cord question? Unless your current power cords are either damaged or undersized for the current load, paying for fancy power cords is a TOTAL WASTE OF MONEY! Geez, I can't believe this is still a topic.