Are there any King Crimson fans here?

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I just heard a song entitled, "In the Court of the Crimson King," yesterday--Children of Men, to be preceise--and immediately fell in love with it. I did a bit of research and found out that it was recorded by King Crimson. I'd really like to get one of their albums and was hoping to find someone here who knew something about them and might be able to recommend one. Your advice would be appreciated! That weird bit o' art that I've added to this discussion it the album cover that I found on Amazon's site.