Gibson marine muffler ?'s

[vee-driven]

I am looking to install some mufflers on my 21' rayson craft, the transom has 6" tips now and i wanna quiet it down so i don't have to hassle with the popo's, i am running a 572 with alot of boost and i have cmi's on the motor and i have to make some water jacketed tubes to connect the headers to the tailpipe/mufflers, has anybody used the gibson mufflers or have suggestions on other mufflers/silencers or pictures.
http://i121.photobucket.com/albums/o236/path5150/transom_sml.jpg
new 572 thats going in with the cmi's
http://i121.photobucket.com/albums/o236/path5150/patsnewpics007.jpg
back of boat for refrence.
http://i121.photobucket.com/albums/o236/path5150/09270616221.jpg

[VegasHallett]

I'm somewhat in the same boat (sorry for the pun) I was wondering what the tone difference is betweeen the CMI muffler vs the Gibson bullets. I'm getting a blown 540 built and need some muffler that have either a rubber flap or mechincal device to help prevent water intake due to my old mufflers touching the water at idle.