Sorry guys, but its an exhaust question, did a search, didnt see anything thats specifically what Im after. (its always possible Im blind and missed it lol)

Currently, the car (MY02 wrx) has a 3.5" TBE XForce exhaust on it, while I love the note, I would like to quieten it down, Im probably looking at a better solution than sticking that little bung thingy on the end that came with it.

Is there anything I can get put in the system somewhere to quieten it down?
Or would I just be better off replacing it with a quieter system, and if so, which? (2.5" TBE?)
To follow on from that, the car has been Verso tuned, so with that in mind, would the car need to be retuned with either or both these options?