Ok. You win on the most original question recently.
I will admit that I never thought of where I should move to get great power. I can say, I used to live in Tucson, Arizona. That is not it… because of the thunderstorms that knock out the power during the summer… they are truly beautiful though.
I now live in Vancouver Washington in an area with no above ground power lines. The power is reliable. But, my system still sounds better with my power conditioner. There are a few individuals that live in places that sound as good without a power conditioner. I guess that are the conditions you are looking for.
So, I can say Tucson, AZ and Vancouver Washington is not it.
I always thought it was $0 to $10K (small) factor in building a great system… whether to use power conditioning or not. The room, speakers, and electronics being far more important. The $10K is, either do a lot of power conditioning or none.
Fyi, my streamer is battery powered (Aurrender W20SE), and a couple of the better sounding headphone amps I have heard were battery powered. So, clearly good power is important… on the other hand, the highest quality preamps, and amps are two box solutions with power is at least half of the design. The best sounding stuff has put a huge investment in power management. I am not sure being located in one of those areas actually negates the necessity of all that power management stuff.