Amon Amarth isn't really in one genre: their lyrics are typical Viking Metal, but their music is unlike normal more Melodic Death Metal with Death Metal vocals. xD
But anyway, Dimmu Borgir is no Black Metal (any more), since 10-12 years they're Dark metal.
I like Norwegan Black Metal too. But especially small, unknown bands like Sigtyr, Cor Scorpii, Windir etc.