Subterranean Dining Room - Atrocity Exhibition
Afterhours - Shadowplay
A good cover to me has to be either (a) a complete bastardization of the original or (b) something where the band covering said makes it their own, taking further musically than originally intended.
Sadly, there are too many bands who do mediocre covers and then showcase them as a great accomplishment when quite often they're undeserving of a b-side.
I'll have to do this again sometime.