Here are a few well recorded performances that have to sing in captivating fashion, or I wouldn't want the system! Each has its "tells" for revealing the sonic influence of a system change.
Jazz:
Shelly Manne & His Men - at the Blackhawk, Vol. 1 "Summertime"
Charles Mingus - Mingus Ah Um "Goodbye Porkpie Hat"
Grant Green - Idle Moments "Idle Moments"
Classical:
Bach, Passacaglia and Fugue in C minor, BWV 582, Peter Hurford on organ
Bruckner Symph 7, Gunter Wand & NDR - "1st Movement" is telling
Debussy, Zoltan Kocsis on piano - "Images, Livre 1: Reflets dans l'eau"
Enrique Coria - Latin Touch "Verano Porteno"
Rock:
Beck - Odelay "Where It's At"
Neil Young - Live at Massey Hall "Old Man"
Low Reed - Magic & Loss "Power and Glory"
Pink Floyd - The Wall "Hey You"
Jazz:
Shelly Manne & His Men - at the Blackhawk, Vol. 1 "Summertime"
Charles Mingus - Mingus Ah Um "Goodbye Porkpie Hat"
Grant Green - Idle Moments "Idle Moments"
Classical:
Bach, Passacaglia and Fugue in C minor, BWV 582, Peter Hurford on organ
Bruckner Symph 7, Gunter Wand & NDR - "1st Movement" is telling
Debussy, Zoltan Kocsis on piano - "Images, Livre 1: Reflets dans l'eau"
Enrique Coria - Latin Touch "Verano Porteno"
Rock:
Beck - Odelay "Where It's At"
Neil Young - Live at Massey Hall "Old Man"
Low Reed - Magic & Loss "Power and Glory"
Pink Floyd - The Wall "Hey You"