Best song for immediate impact when presenting or testing?


I, as most of you, have my regular tunes that I play or listen to when trying out a new system or playing music for friends. My current starter is 'Feels like Rain' by Aaron Neville. It engages me immediately because I love it so, but it is also very well recorded and has a bass voice doing backup which in the right system has a real visceral impact.

I was at an Audio shop recently, listening to my standards, and wanted to show the sales consultant a piece that he might not have heard. I played 'Golden Rust' off the Miles Gurtu album. After about 30 seconds, he pulled out his device and added the song to his favorites. I asked why did he add so quickly, and he said that the opening electronica had a three dimensional stereophonic quality that made a remarkable impression right off the bat. I paraphrase lightly; that was his comment.

What pieces do you play of any genre that have an immediate impact, especially for people listening to a good system for the first time?
128x128cmjones
I’m curious. What does it say about the ears, listening skills and sought for sound quality on this entire forum when so few classical cuts or movements are mentioned. A system either can or cannot re create the experience of a full symphony orchestra in full stride on a great recording. Voice of known artists also, solo instruments also. Everything else is color and whatever sounds good to you. Nothing wrong with that but not the same thing. Among many others I could mention I suggest Aaron Copland Appalachian Spring Leonard Bernstein New York Philharmonic.

For the record I listen to rock and jazz as much as classical.
F.K.A Twigs, self-titled EP, side 2
Janelle Monae, Dirty Computer, side 1 LP 1
Marion Hill, Act One (expanded 2 LP set), side C
Goldfrapp, Silver Eye, the whole damn thing
Noisia, Split The Atom, title track
G.O.L. The Sensation Of Tone, Angelica In Delerium
Bassnectar, Reflective Part 1 and 2, side 1
The Dazz Band, Let It Whip
Commodores, self-titled, Brick House

That should do it for starters. . . 

Steve
Sleep walk ,is a classic , for hard rock peace in Mississippi -Jimi H
Led Zep - communication Breakdown , or Jeff Becks Classic -
because we ended as lovers
Hhmmm...

if I really want to test the quality of a sound system in respect
of spatiality and impact to new listeners my choices are:

Roger Waters - The ballad of Bill Hubbard (Amused to death)
=> the more on the left side the radio speaker is, the better the sound system
Malia - Don´t explain (Black orchid)
=> the vibraphon is behind (!!!) the listener
Eurythmics - I love you like a ball and chain (Be yourself tonight)
=> close to the end of the song the voices are marching around you
Fever Ray - Keep the streets empty for me (Fever ray)
=> the intro sound dots are moving from down left to higher right
Yello - Takla makan (Touch Yello)
=> the soundscape of a virtual movie plot can make people stunned