Thanks everyone for all your input. I went with the S-Type and have it installed. It sounds amazing, I can hear it slightly when driving down the highway at speed or putting around town. And wow, what a sound when you get on it..
The only thing I didn't take into consideration (until after I ordered it), was how loud it is on a cold start - I personally like it, hope my neighbors like it too.
In short, I probably should have gone with the touring, but in the end, loving the S-type.
For other out there that may be worrying about disturbing your neighbors, on a cold start the S-Type is loud and will let them know you started your truck.
Please note, this is on the 6.2L - Not sure if it would be the same on the 5.3.