Annoying neighbors. Any legal steps we can take to get them to realize the world doesn't revolve around them?

Unfortunately, without the police intervening for disturbing the peace, this is just going to escalate between you until something occurs that interests the police (like ault and battery). We had a similar problem with a neighbor that just kept getting worse and worse until it literally came to fisticuffs. Aftger that we just gave up and sold our house. Now we live in a nice neighborhood, with normal people who don't want to make our lives a living hell. I would call the police each and every time they disobey the noise laws until the police get tired of hearing from you. Eventually, someone will do something. (But don't count on it.) Good luck - I feel for you - it sucks the quality of life right out of a nice house, doesn't it?