JKT, I think Stealth answered yur question. Sorry it took me so long but I've had trouble getting the site to come up for about three days.
From what I've heard the SoftLoc should be about as quiet as they come. The mount is rubber which in and of itself absorbs some bow vibration. Not only does it do that but it isolated the quiver from the bow. Now, I don't know this to be fact, but I'm going to get one. And I like the three arrow version just to keep the bow balanced better. Besides, I've never seen a need for more than three arrows in 30 years of bowhunting.