I used 12AWG Belden (acquired from Ernie "Subaruguru" Munier) for my pre/source line, and 10AWG Romex for my amps line. For outlets, I used all PorterPorts. Ernie also helped me make up two custom 4-way breakout boxes with in-line switches. The one for the pre/source components used 12AWG Belden (w/ exterior ground wire) and the one for the amps used 9AWG Belden. I am very happy with the results.
Tom.
Tom.