Update:
I did not tell my wife about the muffler swap to see if she would be able to notice the difference inside the cab. We went on a 350 mile trip this past weekend, and she did not notice. I can definitely tell the difference in volume/tone, and would not want the muffler any louder. The purpose of telling this was to emphasize that there is no drone with this muffler.
Secondly, and most intriguing, I ran the numbers on the MPG for the trip and got better gas mileage than I have seen in the last 1.5 years. The trip was up and down through winding hilly roads and not interstate. I have never been impressed with the gas mileage of my truck and was hoping I would not see a decrease in MPG, so I am thrilled with the results so far. I have hand calculated my MPG since day one and keep a running spreadsheet. I will update this thread after a few more tanks of gas as to whether or not the increase continues.