Which of these power cords ?


I'm looking to upgrade my sound with upgraded power cords. Given I've got a tube preamp, 2 mono block tube amps, Aurender DAC and 2 Martin Logan speakers - we're talking up to 7 power cords so I'd like to keep the total cost for all of them to $1000ish. 

And some suggest going with one brand, to get the biggest benefit.

Brands on short list include:
Suggestions?

cdc2
  this is why you can't really ask this kind of question     you get a answer like      Pangea
  Audio Advisor  hero
You buy that cable for the pulling of a car out of a snow pile only   
After installing the GroverHuffman Pharoah A/C cables in my CD transport, DAC, pre-amp and amps, digital often (7000 CDs) sound as good or better than analog, of the same recording (28,000 LPs).  As a beta tester and previously using GroverHuffman Empress A/C cables (less than SOTA resolution, frequency extension and open sounding but very nice, balanced sounding), I have found the Pharoah cables superior to many $3000-$15,000 A/C "SOTA" marketed cables by companies such as High Fidelity, Transparent, Kimber, Audiosource, etc.  at a cost of less than $1000.  Head to head, the Pharoah is preferred (at audio shows where the dealer's are anxious to keep the cables in their systems for the show duration-however, as hand made cables, Mr. Huffman can only manufacture a limited number per day).  I agree with a prior post indicating that one should first upgrade their power outlet to see if their system can reveal the benefit of a more costly A/C cable.
Chinook91 you are absolutely correct in your skepticism.  The typical in house wiring, in the US, is a 15 amp circuit with 14 gauge wire and could easily run 50 feet or more.  This terminates at a circuit box and a breaker on one end and an outlet at the other end.  All of this will have much more impedance, discontinuities, etc, than the last few feet of cable.  If it is worth spending thousands of dollars for the last 3 to 6 feet, then it must make sense to spend $100K or more for the wiring from the power company connection to the outlets these cables are plugging into.  This is just a really good way for cable companies to make a ton of money from people that don't understand physics.

That said, the placebo effect is proven to be real, so I'm sure people that spend $5K on a PC can hear the difference.
On the contrary, the power cord is the first 3 to 6 feet outside of the component that alters the performance.
In my system Power Chord swapping is easy to hear the differences...the same power cord on my DAC can sound vastly different on my preamplifier and again on my amplifier. I enjoy trying new power cords and have collected a lot of them. The Black Sand Audio is a great sounding cord on all my equipment and at a fair price...I purchased mine used in good condition.