I'm looking for a good mouse, therefore, both the mighty and magic mouse are ruled out. What do you suggest? I was thinking about the MX518, but it isn't designed for the mac, and I have never used one. I was also thinking about the MX revolution. I would love it, but it is a little expensive... Unless I bought it used for 40$. (ick, used.) Open to all suggestions. Anyone used the microsoft sidewinder X5 on a mac?