Of Natural History is utterly insane, perhaps the ugliest avant-prog album of all time...needless to say, it rules immensely. The monstrously low bass and scattered percussion noises makes Crimson's rhythm section(s) sound almost conventional in comparison.
They're even better live. Best concert I've ever seen.
"The Donkey-Headed Adversary of Humanity Opens the Discussion" is their best song (and it's even better when combined with its intro "A Hymn to the Morning Star").
I am the ADVERSARY
And must remain... the adversary
I just assumed that everyone knew all the bands I did since they regularly talk about bands I've never heard of, but, then again, Slough Feg was a huge hit here only a year or two ago.