Covers

I agree with Styg and Final Vision, a Metallica cover would be great. Not Blackened though, The Forsaken already did a kick ass version of that. Dyers Eve would be awesome though, or Fight Fire With Fire (I can't stop listening to that one lately)! But pretty much anything Black Album or before would be good.
 
I still say Peruvian Skies. Covers aren't that interesting unless they differentiate from the band's normal stuff. For that matter, Doors would be pretty cool too. In terms of favorite covers, In Flames -Land of Confusion, Kalmah- Skin off my Teeth, Cradle of Filth- Hallowed by thy Name