I have experimented over the last past three years with various wires to use for dedicated 20-amp circuits. I have the following wire in use in no special order:
1) 10 gage Romex
2) 10 gage UV
3) Belden 83802 (12 gage) (Some people say they hear a great difference using this)
4) Virtual Dynamics 10 gage BX Cryogenically treated with Cryo'd circuit breaker. *
I have not tried the following but Im sure it works very well, 10 gage solid THHN (white/black/green) manually (electric drill) spiral twist and snake through conduit, grounded to the panel.
To my ears on my revealing system I hear NO difference between (1-4)! I think simply using a dedicated circuit with 10 gage copper makes the biggest difference.
I hope all that read this find it helpful, its cost me about $500 (out of my own pocket) to complete the testing.
* There might be other positive factors to using cryogenically treated wiring besides Sonics. It might lower the operating temperature of equipment.
I do not think there any breakers that work better than others for audio applications however it's possible that a cryo'd breaker and wire might have some advantages as mentioned above.
It is commonly recommended to run at least two or three dedicated lines from the breaker box.
As for your last question I recommend you read the post below on Audiogon in it's entirety:
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1058278893&openfrom&1&4#1
I also like the cryo'd Porter Ports. They have become my favorite cryo'd outlet. For certain applications I also like the Wattgate outlet. Check out my review on the Porter Port outlet, there is other valuable information listed there.
I'm sure others will have some good suggestions also.
Best regards,
