What a neat idea! I find it particularly intriguing to consider that, if the composer were to choose the winner, it might be the person who came closest to the composer's original interpretation, but it also might NOT be. That is, the composer could have a particular interpretation in mind, but then along comes someone who takes it into a completely different direction, and the composer could end up thinking, "whoa- I like THAT version even better than what I had in mind!" This extent of flexibility wouldn't be possible with a typical classical piece. Sure, there are differing interpretations of the Moonlight Sonata, but there aren't many (serious versions) that would leave you utterly shocked in surprise at the direction it went. But this type of thing... who knows where it would go?