I am a big fan of Thunder Dash's music, and this piece is no exception. This arrangement transforms This Day Aria into a powerful piano duet.
I think this is a brilliant piece for a piano duet. Since the song has two voices, having two pianos seems like a natural fit. You can listen to it over on Soundcloud or take a look at the sheet music.
Thunder Dash also remarked in his email that he would be truly impressed if two people could play it without stopping or giving up. The challenge has been issued!