What is there to say that hasn’t already been said? There is no equal to him in any facet of the standing game.
He has the best kicks, the best knees, and (as you might have guessed) the best punches. Marquardt, Irvin, Okami, and Henderson (just to name a few) have all felt the speed, power, and accuracy of his punches. His first fight in the UFC was against iron-chinned Chris Leben, and Silva landed literally every punch he threw at Leben. Less than a minute later, the fight was over.
Another spectacle was Silva’s fight against Forrest Griffin at UFC 101. In what was undoubtedly the most dominant striking performance in the history of MMA, Silva completely outclassed and embarrassed Griffin (if you have not seen the fight yet, stop everything, and watch it immediately).
The video is awesome, and puts Silva's greatness into perspective. Plus, I love watching that front kick.