Not to mention the infamous click that got left on, I don't know how they missed that one. I don't think that its possible to top the cover of Total Eclipse of the Heart featuring the guys who smashed appliances for percussion, that was pretty epic.
why the fuck would they cover opeth's weakness. An opeth song would be sick because they're legendary and death is way over covered but not weakness...
An Opeth cover would be career suicide. You would never escape it in reviews or interviews, even 6 CD's from now.
Behemoth is not an option? Hocus Pocus by Focus would be awesome, that is a great heavy, jamming tune. Johnny Cash, The Who, Yes, Elton John, wait... what can you guys afford to cover? That's the real question! You've gotta pay for rights, and royalties... Maybe you could cover Immortal or Burzum? Bathory?
Dissections - Retribution storm of the lights bane or maybe Enslaveds as fire swept clean the earth. Both crushing songs.