Favorite song to demo or test drive speakers?

What is the first song you played when you listened to your new system for the 1st time? 
Famous Blue Raincoat - Leonard Cohen
My Favorite Things - John Coltrane
Bitches Brew - Miles Davis
Caravan, Ocht O'clock Rock - Duke Ellington
Overture - Tommy - The Who
Sisters of Mercy - Leonard Cohen
St. Thomas - Sonny Rollins
Space Oddity - Bowie
Avalon - Roxy Music (the whole album)
Boys of Summer - Henley
Voodoo Chile - Hendrix
Fanfare for the Common Man - ELP
Anette Askvik - "Liberty"

The Steel Wheels - "Keep On"  "Wild as We Came Here"

Jennifer Warnes - "Bird on a Wire"

Greg Laswell - "Come Clean"

Tribal Seeds - "Dawn of Time"

Tara MacLean - "Red"

Patricia Barber - "Nardis"

Katie Melua - "Fields of Gold"  "The Little Swallow"

The Wailn' Jennys - "One Voice"