Only seen Shinedown, Sevendust and Lacuna Coil live before from those.
Sevendust were appalling. Dullest set I saw out of 30-odd sets at a four day event.
Lacuna are alright, but not for too long. They get boring.
Shinedown I've only seen play a 30-minute support and that seemed just about right, as they only have about 30-minutes of really top-drawer songs.
Zombie I'm seeing twice this year. Can't wait.