- relayer and close to the edge by yes, the lamb lies down on broadway by genesis, and uk/uk are pretty easy

- hamburger concerto by focus (that's a tough one, not a memorable cover by any means)
- scheherazade by renaissance
- a couple of king crimsons of course (larks' tongues, discipline, in the court of the crimson king)
- brain salad surgery by elp (that's a particularly awesome, timeless cover)
- minstrel in the gallery by jethro tull