Definitely Disturbed. Lacuna Coil, Chimaera, and Killswitch were there too but they were sub-par. Dave Draiman's stage presence was awesome, the show was unbelievable, I moshed, crowd surfed, high fived Dave Draiman, bathed in beer, etc. I was on the floor for this one, that's what made it epic. My ears rang for a week straight afterward.
Though I saw Godsmack, Drowning Pool, Motley Crue, Charm City Devils at one concert, that bill was stacked. We had

seats, though because that venue doesn't have a floor and gouges for ticket prices. I plan on going to Rock on the Range, though, so that might top other shows I've been to.