I've seen C.O.C a couple of times, last time was in support of the album "Deliverance" (which I think is the best album with Pepper singing). The best though (in my opinion) is "Animosity" with the bass player Mike Dean on vocals. Mike Dean is one of my all time favorite bass players.
http://www.youtube.com/watch?v=HMEj6Rji-50
Sincerely, Clayton