For a Hoyt I would go with the Vibekiller from Cool Hand Luke on www.archerytalk.com. He makes a custom mount that will install in the hole where the rubber risershox installs under your grip (if you have one). It looks awesome and works great. Here is the link:

http://www.archerytalk.com/vb/showthread.php?t=412663&highlight=hoyt+vibekil ler