Is E3 Devin Townsend's Ghost?
EDIT: The following are all more guessy, but I reckon...
C5 is a Sigur Ros album. Not big into them, but I'm gonna guess it's ( )?
Again, not a fan of this band, but I think... might C2 be The Parrot, The Pariah, the Delusion by Dredg? Probably just exposing my own ignorance, here, but I remember the art looking envelopey.