Little update.. been having another rattle/vibration only at a certain speed and rpm. Research tells me maybe my tires need to be balanced? I can trace the sound to the passenger side under the car(sounds like its coming from near the cats area)
Video:
https://www.youtube.com/watch?v=O5DfEARMjDM
Also was able to get the car on the lift and I was surprised to find no loose exhaust parts... I'm out of ideas