Northshore briefs are amazingly quiet. And I was surprised at how comprehensive it is. The only iffy thing I do not like about the diaper is that lengthwise, it tends to be quite short- especially the mediums. The mediums fit almost like a small. When I was doing research on them, I saw it got rave reviews on both incontinencesupport and adisc.
They are very quiet and comfortable once you break it up & fluff them. I will have to post a review here sometime

As an aside- the sound from many diapers I found can generally be controlled well by a good pair of plastic pants & maybe onesie(compresses and supports it slightly).