I've kind of been noticing that sometimes a bands' best material (arguably) comes from their so-called "transitional" album. For example, Emperor made an obvious transition from 'In the Nightside Eclipse' to their later more progressive stuff. 'Anthems' is the obvious "transition" album, to me at least. Some people might argue which album was the actual "transition" album, but the ones in the poll are the best I could come up with.