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
I see a Purist Audio Dominus Diamond PC listed here for $4495. You'd have to be crazy ...
Ditto for the Tara Labs Evolution Omega at a mere $5300 - original MSRP of $12K!  
Buy Pangea and stop worrying! To believe that the "grass is greener" over there is to be caught up in a neurotic obsession!
You can certainly hear differences in power cables , if your equipment is up to allowing you to hear it.
Then it becomes a matter of how much difference you can hear. I have owned the Purist Audio Dominus Fluid power cord as well as the Dominus Fluid speaker cables and the Interconnects. They are the best cables that I have ever heard..IMO.
So, you have to decide how much better any are vs. what you have . You can only do this by trying them in your system