Ok,
The Wailin' Jennys, 40 Days, just about any song, for female voice clarity & purity.
The Pentangle, Cruel Sister, When I Was In My Prime, for cabinet resonances.
Kodo, Heartbeat of Japanese Drums (Sheffield CD only), O'Daiko for bass overhang.
The Pentangle, The Pentangle, any cut, for high frequency transient response and extension.
Paul Simon, There Goes Rhymin' Simon, many cuts for male voice character and fidelity.