So to answer "Blah", yes, two different dealers, gave one two chances, first chance "Unable to reproduce", called BS, drove the service manager in the car and showed him. "We have to order parts". Brought it back to have them replace the strut mount and some "link", don't have the sheet in front of me.
Noise was still there. Waited a few months, brought car to different dealer, happened to be a week or so after the TSB about the engine mount issue, replaced said engine mount.
Now, the noise is MOSTLY gone. I would say 95% gone. The reverberation is gone, only one thud now, and it is lessened considerably. Unfortunately, I do think its in the harmonics and design of the car. It's definitely live-able now, but wasn't before. Even my uncle, who is a GM salesman, when he rode in the car the first time commented on the noise before I got it fixed.
As for a side note, the radio issue, I changed my setting to "low" for the speed sensitive setting and that seemed to fix that issue. And "miraculously", my climate control is actually working OK now. Guess these cars don't like winter, just like us humans. LOL
Still turn heads in the car, and I know its not me, cuz I'm DEFINITELY not a looker. This from a guy who bought a new first year sled this year and had his fair share of issues with that, this car was NOTHING compared to that... All vehicles have issues one time or another, Lets just hope this stays fixed now
Steve