All the recordings mentioned are well recorded but might not challenge or tax a system to reveal its weaknesses. Beethoven Symphony No, 9/4th movement(Ode To Joy) will challenge any system. I have always played the Vaclav Neumann/Czech Philharmonic(live recording) Denon 81757 7575 2(CD format). Notice how few(if any) audio show demos of "Ode To Joy" on Youtube.
