One or two dedicated AC wire ?


Would it have a signeficant audible in performance between: FIRST- a dedicated AC wire for an audio stereo system connected to a power distribution bar with good AC cable and Furutech Duplex. SECOND- the same as first version, but adding another dedicated AC wire, and an other wall Furutech Duplex, to connect only the stereo power amp. Would I hear a significative improvement for the investement of time and electrical parts ?
audiosens
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+1 Elizabeth, "...at some point on the upgrade path..."
IMO that point occurs after you have done a dedicated room, correct set-up for the best sound quality, and room treatment. Then, consider a dedicated line(s). The room and the setup are going to determine at least half of the sound you will hear.
 audiosens, you have a beautiful system and it deserves to have dedicated lines to the service panel. Your power setup has good cables and the distribution block will receive cleaner unrestricted power with dedicated lines.

Your attention to detail with vibration control and system layout is to be commended. 
Are you in a position to run lines to your service panel?
And what power cables and conditioner are you using?
You may find yourself wanting the second dedicated circuit depending on what gear you're using. I have 4 dedicated 20A circuits, and 1 dedicated 15A circuit, and I'm finding I could have benefited from having at least one more added. But I'm a bit of an extreme case.