It is ridiculous to think one track can reveal all the features of a system you should be evaluating. You need a playlist of tracks. I would say 10 at a minimum although my test track playlist always grows from that as I discover new tracks that exemplify something I think is revealing. That playlist should show you something important in the first 30 seconds of a track and they should all be recorded at about the same level so that you aren't constantly changing volume.
Having said that, if you are willing to plow through all 9 minutes of Nardis and are one of the rare individuals that can actually remember what something sounds like for more than 20 seconds, then it is a pretty good choice since it is well recorded and incorporates a wide range of sonics. But it is less than ideal if you are using it to A/B compare two pieces of gear which is my normal procedure.
But everybody has a different way of doing things so as the kids say you do you.

