Audio tips for rewiring old home

Your most cost-effective move by far will be to run one 20A line direct to your main system outlet. That's it. Use ordinary $2 or whatever outlets. If you want, go to the hardware store and give them a real good look, some use better construction than others, pay an extra buck or two for those. Hospital grade is a joke, with nothing any different in the way of sonics. Then later you can figure out if you want to buy Synergistic Blue or Orange, outlets that actually will make a difference. 

Then run whatever other circuits you need the normal way. Just make sure your one direct line goes to your system, as you will not want anything connected to the system connected to anything else.

Hospital grade grips tighter. Not as funny haha as Synerjizztick though.

String some Cat8 to future proof for a few years. Although I have no lan cable installed. I'm happy with a Node router 

Don't forget Ethernet! :)

Don't care what brand, but it's always good to have Ethernet options for streaming in the bedrooms and listening rooms. 

Install some outlets up on the walls to allow for wireless speakers coming down the road. Self-powered, wireless speakers will be the norm soon and nothing dorkier than extension cords hanging down from your speakers. Don't forget the ceiling speakers for Atmos and the like.

For your listening room use shielded cable. I would go 1 gauge heavier than 12.