I use a B-Stinger (12"/14oz model). It holds better than any stab you will use. It does nothing for vibration, but then, it's not designed for that, it's designed to stabilize.
I use the wild Thing also. I bought it because it's the perfect balance for my Guardian. I can pass the time sitting in the tree playing with my "Thing". LOL Yup, needs the blue pill. LOL Another reason I picked it, it'll fit in my bow case without me having to take it off. And it does match the camo on my bow.
I don't use one. I own 5, but I see no difference in my groups at any distance nor can I hear any difference in sound. The top of my bow still rocks forward with the shot.