mm....well:
Michael Angelo things are damn fuckin hard to play....For example alll the "planet gemini" album, its terrificly hard
Cacophony stuf is hard too, the instrumental things like Go Off!, Concerto or Speed metal symphony.
Cephalic Canage has some pretty technical things on his songs too, pretty good musicians.
Racer X things are also haaaaaaaard, some like technical difficulties or YRO or BRO or Frenzy....

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