after market power cords for power conditioner or amps etc

Hello,  my front amps, subwoofer and A/V processor are plugged into a Furman IT 20I.  I was thinking about getting some middle of the road after market power cables to experiment if the power cords really make a difference.  I am thinking it would be a good idea to begin by replacing the power cord on the Furman IT 20I instead of incrementally repacking the A/V processor and amps chords.  Please advise.
Thank you.
Guy