if you already have the dual out you could try swapping the muffler. there are some sound clips if you use google search.
I like the stock exhaust on our limited, has a nice sound when taking off but not too loud.
The CBX, at least i think thats it. There are videos on youtube of people who have them on 2.0's and they sound decent. If you already have the dual exhaust it should fit in fine, if not one of the people on youtube had to remove and cut a slot in the rear fascia.