it's too bad that you have an auto
my friend drive stick and whenever he shifts, it makes a "pssst" noise, almost like a turbo, but that was on a Injen CAI, i dunno about AEM. I remember when i first got my CAI, i was going to **** in my pants because it was really cool, now the sound of my Greddy EVO kills the sound.
About the whistle, i think it's normal for all cars with CAIs cuz i'm getting the same noise. I think it's tyte as hell and you'll get used to it.
again, congrats on your AEM CAI