I had a D7000, which I was happy with. It didn't buzz and had no IR whatsoever. It broke due to an accident.
I replaced it with an E7000. It buzzed and I could hear it from 15 feet away. I exchanged it and got another that buzzes the same. The Samsung tech came out and said it was normal.
Is this true? Do they all buzz, or should I keep exchanging until I hopefully get a quiet one? I don't know how many that will take or if quiet ones even exist.