Well..I would ask first what do you have on it already?
If you just have the stock Hush Kit & Vibrablocks I would wholeheartedly recommend upgrading to the 2004 versions, or the easier installed choice would be adding some Sims brand gear like a pair of Stealth Limbsavers & String Leeches. Except for my new Liberty, every bow I have had in the past few years regardless of manufacturer was immediately equipped w/ Limbsavers and Leeches. They really make a difference.
Also, If you don't have one already, a good shock absorbing stabilizer like the SorboTek, Stealth, or Sims will do wonders as well.
Hope that helps