CD's for auditioning

I second the Dire Straits, Diana Krall stuff for critical evaluations. Probably just because I like that stuff and know the songs so well but also since piano and vocals are harder to get right. Other than that any unamplified performances you know really well. I always take along a few songs I know well but are not that well recorded too.

Dire Straits- Best of
Eagles- Desparado- First cut is Doolin" Daltons.
Steely Dan AJA- Listen to "Peg".
Fleetwood Mac- Best Of.

I do this for a business, so I need the best. I like to use the following jazz track because of the intense piano passages. If your system does these well, without halos, echoes, reverberation or sibilance, then you have arrived:

Gene Harris - the Concord Years, disk 1 - track 2, 4 and 6

Great piano and string bass - very dynamic.

Thanks for the inputs... just to clarify. I operate a small audio store and I am looking for CD's for our customers to audition... thats why i am asking :)

Keep the suggestions comming.

Products to be auditioned - speakers, amps, pre-amps, CD-players, cables.

Loreena McKennitt- The Mask and the Mirror(Celtic New Age)
Clifford Jordan- Live at Ethel's (Jazz)
McCoy Tyner- NY Reunion (Jazz)