IXXI is really mediocre. Assorted Armament is an okay listen for about 20 minutes or so. Black and roll should be limited to EPs only.
Since some of you guys probably are interested in dark ambient, I'm going to recommend Trist (Ger). I think his metal stuff is pretty interesting, but the Initiation album compares favorably to Leviathan's ambient album, but it doesn't feel quite so dark. It's more composed and has more range than Willenskraft, which is about 30 minutes of metal and 30 minutes of ocean sounds. Initiation is a fairly limited disc (500), but I don't think the band has a particularly large following.