My Quill exhaust is actually a straight through race can but with a nice deep but non evasive tone to it, especially at low revs, but i just don't like the feel or sound of it with the baffle in it, even though the baffle is cut down.
My SP Engineering exhaust is just raw sounding, with the original baffle in, but also marked up and legal.
I tried it once without the baffle and as awesome as it sounded the attention i got was beyond ridiculous so i immediately put it back in.
Saying that, there's someone who keeps riding around my area who sounds like they don't have an exhaust fitted at all, not only does it sound terrible but the noise is obscene.