Power Cable suggestions for Pass Labs X250.5


I just purchased a new Pass Labs X250.5 Stereo Amplifier. Is the Factory AC Cable OK? Are there any inexpensive (<$300) aftermarket Power Cables that offer noticable sonic improvements with this particular Amp.?

I plan on installing a 20A Dedicated AC Line for this Amp.
flav
I used to own the XA160 and spent a lot of time talking to Pass Labs directly about this and they do not believe that an aftermarket pc improves the sound with their amps. I tried a few cords on my amps and did not hear any differences. This of course is just my experience.