The Bros. Landreth, How Deep Is Your Love, from the Paul Yee-mixed album Undercover Bros. One of my favorite tracks and a great demo and test track.
Available on Tidal - the one with the blue cover.
Amber Rubarth, Losing My Religion, from the album Scribbled Folk Symphonies. Available on Tidal. A great rendition and wonderful sonics - huge open space, accompanying instruments very 3D. The definition increases and the space becomes clearer and more open with every system improvement.
Dave's True Story, Like a Rock, from the album Dave's True Story [Version 2002] available on Tidal. Great song and performance, with incredible open and 3D sound stage; all sounds seem very real (how about those fingersnaps!).