A high-quality modern recording of a core piece of the piano repertoire? Completely free? Legally?
Funded through a Kickstarter campaign, and released to the public domain, this can be downloaded and shared as much as you want. There's also a new edition of the score available, produced using the free software MuseScore. Spread the word, because it's so important to highlight how the internet can help create and share music, to artists' benefit as well as the public, without the need for the control of multinational companies or the restrictions of copyright.