Welcome to the club. Aside from that, how are you enjoying your new ride? You should revise your profile pic with your ride so we can all see, maybe revise your signature, too. But welcome!
They ALL do it despite some people saying their motors are "dead quiet".
What you describe is the "2k rattle". Most, if not all Gen 3's do it. There is controversy as to what it exactly is, but many seem to think (me included) that it is piston slap.