Hello chazzman.
What a completely subjective dilemma you face. Three things to consider: Looks, sound, and cost.
I have D & D's and am very happy with them. They are glass packed but loud on acceleration, quiet like Flow Masters during idle and cruising....and cheap @ $499.99US. Nothing close in price to them I assure you. D & D has been in the silencer biz for a loooong time as well.
I am a traditionalist so I prefer the three pipe look, however the D & D's (two pipes on right side)were on when i bought the bike, and well, I've fallen in love with them. Partly because they are treated as a step sister compared to Jardines, TOR's, and MadDogs(I'm a sucker for the underdog) and partly cuz the sound
ROCKS
Here's a link to D & D silencers:
Impressive D&D Dyno
Not trying to be a downer here, but sound files mean absolutely ziltch-zero-nada. Taking the word from owners is the second best way to figure out what you want, while hearing silencers in person is the ultimate.
Good Luck!!