I get the conversation for intellectual reasons, just not practical ones.....but thank you for the education!
My electrician does work for two audio installers, and has plenty of experience with 2 channel and home theater wiring. He charged me $300 plus parts to install 1 dedicated circuit, and $100 plus parts for the second dedicated line.....and highly recommended pulling 2 completely separate lines. The extra $150 made it a simple decision.