I had a supertrapp IDS on my prairie 650 and I thought it was very quiet compared to all other aftermarket pipes. The only quieter pipe that I know of is the stock pipe. Did you try to change the number of discs to quiet down the sound?
I have a Muzzy with low hours...unfortunately can't get you pics or ship it for a couple of weeks. It has no dents/dings that I can remember...just heat discoloration. I do have the brand new never used quiet insert for it, and the spark arrester as well.