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?

 
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I’ve decided to go another route which will solve more than one problem.
I got a very good buy on a $1400 power conditioner which has four sockets, including two dedicated to my monoblocks:
Isotek Orion Power line Conditioner with Isotek Elite 5 foot Power cord.
Hopefully this will do the job.

Again, Thank you for all your suggestions!
I would recommend building your own power cords using the Furutech.
Typically its best not to use power conditioners for amps.

Mat
www.jjaudiosolutions.com
I second the suggestion about power cords from Signal Cable. I've had 3 or 4 in the past couple years. They're very solid construction, sound good (as much as any competently designed & constructed power cables do), and are inexpensive.

I also use Signal Cable's interconnects throughout my desktop system. Once again, very well built, good sound, and very inexpensive compared to some of the big-$$ products out there.

The owner's name is Frank. He's extremely helpful.

www.signalcable.com

Frank's email is sales@signalcable.com
The Isotek power conditioner and power cord have made a strong improvement to my system: lower noise floor, better bass, better imaging and sound staging.
Well worth the $400 price I bought it for used.
I have been using Pangea and especially noticed the difference with the AC-9 into my C-J classic 60.  I also took the time to run a dedicated 12 gauge Romex line with upgraded power outlet in the house.  If you are able all made a big difference of getting good power from the source of my breaker box.