I know about the Remus & Eisenmann quad exhausts but they just don't seem to fit the style I want, also i've heard how they sound and pretty much it sounds like stock. Which is why I steered clear away from those exhausts. But I do have to agree that the diffuser style does look better.
So I might just ditch the quad setup and do what you did, but you got any more videos? i'd really like to hear a drive-by or higher revs on your new exhausts.