Power cord for digital stuffs?

I would strongly encourage you to try some alternative PC's for your digital.  Every single piece of digital gear I have run in the last 10 years has been elevated in important ways by a good after market PC (EAR Acute, BADA DAC II, Audio Note 4.1, Lampizator Big 7, Lampizator Golden Gate).  The better the DAC it seems, the more I hear this phenomenon.

Of course, it is best if you can try before your buy!

Regarding the Plasmatron, it may not be a silver bullet improvement in all systems.  Steve can now count me as one who owned one and tried it with two different DAC's ( BADA DAC II, Audio Note 4.1) and sold it off.  I preferred the sound as fed from my HB Cable Designs Acrylic instead.  The Plasmatron, in my system, tended to slow the sound, round the transients too much, and made for a duller, more opaque presentation that was uninvolving.

I don't doubt others' positive experiences, but mine was decidedly different.