Quiet comes from a lot of factors, a cog with one chain can be quiet, but throw on a different chain and it may be loud. But sound does not mean anything about quality. Just ask Chris King hubs.
The All-City cog is a very very nice cog. You will not be disappointed if you get one. I am a really big fan of the DA cogs, and they are a little cheaper. But you cannot get them in 18 or 19.
Last edited by Kayce; 08-09-12 at 02:13 PM.