Which CD's for Imaging/Soundstage?

Which CD would you use to check the imaging and soundstage of the speakers/system.

I found these to be very good examples

Branford Marsalis - Trio Jeepy
Eagles - Hell Freezes Over
Cassandra Wilson - New Moon Daughter
Suzanne Vega - Particularly Tom's Diner
Zakir Hussain, John McLaughlin, Jan Garberak - Making Music
Strunz and Farah - Primal Magic