To answer
1.) I did not hear any noise like you are describing from my unit. I was more unimpressed by the sound it sounded very distant when compared to my Onkyo 805, and therefore I am going to look elsewhere for an upgrade.
2.) I can't help you with Airplay as I don't have apple devices.
I actually purchased the same receiver at the same price on sale. I am in the process of returning it.
To answer
1.) I did not hear any noise like you are describing from my unit. I was more unimpressed by the sound it sounded very distant when compared to my Onkyo 805, and therefore I am going to look elsewhere for an upgrade.
2.) I can't help you with Airplay as I don't have apple devices.