Just be warned, they are chaos incarnate. They use a lot of feedback, and aren't fond of hooks or classic verse:chorus:verse:bridge:etc song structures... But they make up for that in passion, you can even hear it in their albums, it's nuts. Go with these songs first, since they are the ones that they play most often live:
The Deaf Policeman
Daggers (You can hear him get out of breath so sickly in this song...)
And Shot Each Other
And then give One Wing a spin... I really liked that whole album, especially "in" and "First"