Something else to consider is that it's possible to partially sound-proof your place.
If you have hardwood floors, you need to set up some layers under your speakers. Step one, go to a flooring shop and get carpet samples. Thick Berber or Frisse works well. You want to cover the area under your speakers or stands. Double stacking the samples is often a good idea. Above the carpet you'll want to put Marble Samples. 1/4 inch thick is good; stacking to 1/2 inch or 3/4 inch is better. If you have a sub, you might want a full inch. On top of the marble you'll want to put heavy duty stands such as sound anchors.
These approaches seem to work for me, along with some strategic planning. I'm in a third floor condo in a city that requires concrete for the first two floors. Thus, my downstairs neighbor's ceiling (and my floor) is concrete. My upstairs neighbor is the HOA President, and my South-Wall neighbor is the HOA Secretary. I have no North-Wall or East-Wall Neighbors.
My sub is 4 inches from my North Wall, and rests on 1/2 inch of marble in a room with wall to wall frisse carpeting. My speakers stands are Sound Anchors, and are all against the East-Wall in every room, except the bedroom, where they are against the North-Wall. My East-Wall faces outside, so only Up/Down neighbors are potentially affected. In the bedroom, the bookshelf speakers are on tall dresser cabinets and over 50 inches off the floor. After 10PM, the volume goes WAY down. Also, FWIW, extensive headphone use tends to give me tinnitus, so I only use speakers.
I've been in my current place 8 years, and so far there's been not a peep from the neighbors about the sound systems.
At the same time, I've noticed that some of the the neighbors will consistently bang on the walls every night at 7PM. At first I found this REAL annoying. Now, I pretty much just ignore them and continue with practicing on my bagpipes until 9PM.
