Emigene, I can't comment on the power cords, since I use Harmonic Studio Masters in my system, however I use all Stealth wires for IC's and speaker cable, so I can help you out with your question regarding adding warmth to your system.
You will not add warmth with either an Indra or Metacarbon in your system. Either cable is just not there sonicly, they just sound "natural" with out adding anything. Yes, the Nanofiber will add warmth to your system. It can be great in a solid state system for that very reason. In my system it offered a beautiful midrange, but was a little to closed-in on the top end for my taste.
You will not add warmth with either an Indra or Metacarbon in your system. Either cable is just not there sonicly, they just sound "natural" with out adding anything. Yes, the Nanofiber will add warmth to your system. It can be great in a solid state system for that very reason. In my system it offered a beautiful midrange, but was a little to closed-in on the top end for my taste.