I believe running a dedicated line to the breaker box for my audio components only, will help isolate them. There are a lot of things that can create noise like the refrigerator and furnace, not to mention compact florescent bulbs. I have had problems in our last house with compact florescent bulbs in other rooms creating hum. We moved to a house in the country and I don't see us moving again. This is it. I now have a dedicated music room, so I want to get the best possible sound.
I have been down the power re-generator path and have found it limiting. I couldn't plug my tube amps into it, so I could only use it for my front end. And after I got my Ref Phono 2se, I was going to have to upgrade. I couldn't have all my front end gear on at the same time. I sold the re-generator and bought a Shunyata Triton which is not power limiting. I have been extremely happy with that decisions.