Omnis would get the wehole room. Depending upon the distance you woll have to decide between card and hypercard. If it is far I would guess that hypercard is the way to go as it has more reach. A card hears at 1.7 times the distance what an omni hearsd at 1.0. This is a rough rule of thumb. I believe the hypercard has even greater reach. You could take both two cards and check them while the band is warming up or just on the sound of the hall when you get there. ;o)