Herbie Hancock/Watermelon Man, released on Sony/Columbia Jazz compilation CD is a great test track for soundstage precision. It's a great test track in many other aspects too and oddly - a fine piece to listen.
For ambience space try Judy Collins spectacular vocal-only Amazing Grace on the Whales and Nightingales CD.
For ambience space try Judy Collins spectacular vocal-only Amazing Grace on the Whales and Nightingales CD.