Lana Del Ray - Venice B**ch. The width and depth of this marvellous production and the layering of the textures will really test the system. Can the system present this complicated production as a homogenous whole? Does the sound completely fill the room as it will on a good system?
FKA Twigs - Home With You. That orchestral ending is tough to get right.
Two previous mentions I would like to concur with - Daft Punk - Giorgio by Moroder I agree is a real system test, especially to hold those rhythms in place. And School by Supertramp has so many system-pushing elements to it.