Man I wish I could go to this.
Avenged Sevenfold, Children Of Bodom, At The Gates, Amon Amarth, Wintersun, Steel Panther, and Halestorm would all be awesome to see, the rest I either hate or don't care for, but I'd go just for the before mentioned artists alone.
6/28 - Def Leppard/Styx/Tesla
8/29 - Rick Springfield/Loverboy/The Romantics
8/30 - Motley Crue