The concept of the song 8v (and the album) is cool, but my vote is for ACoS. Lyrically, there's much more to it, and it doesn't have all the obvious influences showing thru so clearly as 8v does (the Pink Floyd intro, the Yes section, etc.). And I enjoy ACoS far more than 8v, tho 8v is a good, tho overrated song, IMO.