I went from the whisker to a NAP Sizzor. I shot and tried a number of others but settled on this one. In fact I have one on each of my bows my son also shoots the same.
I'm not sure which NAP you had noise with but these don't make any noise that I am aware of. If you simply set it off without shooting the bow, it makes a snap. But even with the Bowtech bows they are on I can't hear it over the bow when shooting.
They were easy to set up too.
Nick