Lots of good information on this thread. Regarding breakers, magnetic type are preferred over thermal as thermal act as a resister, working against dynamic flow. Audience, makes some dedicated in-wall AC power wire as well as duplex outlets under the Hidden Treasure line. I am affiliated with the company.
Dedicated circuits
I just completed installing 2 dedicated circuits. After reading several threads here, I went with 30 amp breakers with 10 AWG wire with high end receptacles. One circuit for the amp and the other for everything else. I’m blown away by the difference. Tighter bass, not as bright, better imaging and soundstage. Should have done this long ago.