Pat O'Brien is a MONSTER guitar player. There's no fucking way around it. Alex Webster, the bass player, actually writes the vast majority of CC's music. If you can break down the barrier of sound and really listen, you will find some very, very complex musical ideas coming from this band. Other than "The Bleeding", I am also more of a Corpsegrinder-era fan. As mentioned earlier in this thread, "Bloodthirst" is their best so far. Colin Richardson produced that one. That speaks volumes in itself.
Cannibal Corpse with Pat O'Brien >>>>> pre O'Brien CC.
I suggest getting everything from Gallery of Suicide on. As said, Bloodthirst would probably be the one to get first.