Any aftermarket PC I've tried sounded better than the stock one that came with the amp (better dynamics and increased soundstage were readily apparent).
You don't have to go overboard and need look no further than here on A'gon.
Try either of these and you'll be happy:
http://app.audiogon.com/listings/ac-cables-cullen-cable-1-5-meter-12-awg-power-cable-silver-plated-made-in-the-usa-2015-01-08-power-93422-atascadero-ca--2
or
http://app.audiogon.com/listings/ac-cables-signalcable-magicpower-cord-2015-01-06-power-11577-roslyn-heights-ny
All the best,
Npnoise
You don't have to go overboard and need look no further than here on A'gon.
Try either of these and you'll be happy:
http://app.audiogon.com/listings/ac-cables-cullen-cable-1-5-meter-12-awg-power-cable-silver-plated-made-in-the-usa-2015-01-08-power-93422-atascadero-ca--2
or
http://app.audiogon.com/listings/ac-cables-signalcable-magicpower-cord-2015-01-06-power-11577-roslyn-heights-ny
All the best,
Npnoise