Power Cables diminishing returns

The problem with this question is that sometimes a $500 PC is twice as good as a $1000.00 one. I find that VH Audio AirSines are hard to beat in their price range, but they are not the right PC for every component. Buying used or going the Cable Company route can make a lot of sense, unless you find folks that have found a really good PC with your particular components.

I have also found that used power cords, especially "last years model", hold their value extremely well, maybe better than any other cable or component. I have never compared an over $1000 cord but like many that list for $600 - $800 and often sell used for less than half of list

The higher the price, the sweeter it is for the seller. The lower the price, the sweeter it is for the buyer.

Sweet spot is whatever VH or Pangea is priced at your comfort level.
You won't feel bad with a cheap ZU Birth either.