Need recommendations for inexpensive power cord


I’ve never used after market power cords and am considering buying a couple.  I have some questions:

Considering the astronomical price power cords go for, is there any point getting one or two in a lower price range?
At what price point do power cords start to make a difference in your system?
I have two monoblock NuForce class D 160 watt amps.  Is this where they should go? 
Can someone recommend an inexpensive power cord that can make a difference?

 
128x128rvpiano
I’m using two of the high power Isotek’s outlets for the monoblocks, and the other two outlets have the DAC and the transport.  The power cord to the Isotek is very high quality.
That being said, I like the change it’s made already.
Make your own ,
Buy Furutech plugs, IRC connectors and bulk power cable,
You'll get one of the best for the cost of a lesser pre-made one.

@rvpiano what power cords are on your Dac and Transport?
While we are at it (if you don't mind) which Dac and Transport are you using?