Power cord - 5 ft vs 10 ft ?

Move closer to the power company's generators.

@thyname - I was going to say that proper cables must be measured in meters and not feet :-)

@audphile1  - You bring up a very important point for consideration.  Assuming that all other things being equal a longer power cord is better, then at what point are you better off to get a higher quality cable in a shorter length for the same money spent.  I'm sure that at some price points the cost difference between a 5 ft power cord (junk) and an otherwise identical 3 m power cord (amazing based on the unit of measure) would be negligible.

Long enough to reach from your equipment to the wall outlet or power strip.

depends on how far is your outlet location

A high end cable manufacturer/retailer whose name everyone here would recognize and respect (and name I will not divulge) told me to buy the size I need. He said retailers push the buy at least 2 meter for best sound BS solely for extra profit.  And he listens extensively to his products and does not hear a difference between PC cable lengths.