My first new vehicle was a 2007 Dodge Ram. I went with a single in, dual out Flowmaster 40. 2.5 in pipes to the tips. That wasn't loud enough, so I went back and a turn down tip put on right behind the muffler. I still wanted something a little more aggressive, so I ordered an Aero Exhaust AT4040. I kept it dumped right after the muffler. I loved the sound it provided. There was a little drone when the MDS kicked in, but a Superchips took care of that.
I don't think Aero Exhaust is still in business, but I went with a Carven Exhaust R Performance muffler on a 2015 model I had, and it sounded just as good. It didn't seem quite as loud, but I think that was because I kept the factory tips in the bumper instead of having a turn down tip right after the muffler.