Run one line to the system. Everything system goes on that line. Run whatever else for lights, room outlets, etc. Whether you do a sub panel or not is irrelevant. Spend more money if you want. The one line for the system however needs to come as direct to the system as possible.
Be careful pingvin, that you're not taking advice from someone who has never wired even one panel, let alone a listening room. I've done panels, sub panels, and have hands-on experience comparing several different wiring methods in the same room. Experience that includes wiring for both 120V and 240V with a step down transformer. I'm unaware of anyone here who can match this level of experience. They do love to talk the talk though. As for me...
https://systems.audiogon.com/systems/8367
What you want is the one power cable to your system to be as short and direct to the utility line as possible. The rest of the room you can do however you like. Its that simple.
Be careful pingvin, that you're not taking advice from someone who has never wired even one panel, let alone a listening room. I've done panels, sub panels, and have hands-on experience comparing several different wiring methods in the same room. Experience that includes wiring for both 120V and 240V with a step down transformer. I'm unaware of anyone here who can match this level of experience. They do love to talk the talk though. As for me...
https://systems.audiogon.com/systems/8367
What you want is the one power cable to your system to be as short and direct to the utility line as possible. The rest of the room you can do however you like. Its that simple.