I too don't like noisy exhausts but I do like the look of the Arrows, Akro's Termi's etc
I have a Mivv carbon can fitted with the decibel killer, it's no noisier on idle and only very slightly noisier when accelerating, I can't hear the exhaust when cruising along, it's also smaller and much lighter so it works for me.
Mine is the bell end version with foreskin style endcap, this can be removed by drilling the rivets leaving the normal much nicer looking (imho) traditional end, something I will most likely do eventually.