The last time I went to a concert (Home Made Kazoku and TMRevolution) I ended up from immense pain because the sound ended up resonating in my chest and made an old Ice Hockey injury in my sternum hurt unbearably. That and I honestly have no idea what musical group I should go see.
At least I got to see T.M.Revolution. He did the Soul Eater opening, a bunch of Gundam openings, and Valvrave's. He's only done 4 shows in the US too, so so I was lucky to see it. Bleh, I wonder if I was farther back it would hurt less?