For demo I would recommend these:
Audiophile Reference IV (All tracks are great, you get a little bit of everything) (FIM)
SuperBass2 - Ray Brown Trio (Try tracks 4 & 6) (Telarc)
Scary Music (Try tracks 4, 10, & 12) (Telarc)
Live Recordings At Red Rose Music, Volume 1 (Try tracks 1 & 6)
McCoy Tyner Quartet: New York Reunion (Try track 5) (Chesky Records)
Audiophile Reference IV (All tracks are great, you get a little bit of everything) (FIM)
SuperBass2 - Ray Brown Trio (Try tracks 4 & 6) (Telarc)
Scary Music (Try tracks 4, 10, & 12) (Telarc)
Live Recordings At Red Rose Music, Volume 1 (Try tracks 1 & 6)
McCoy Tyner Quartet: New York Reunion (Try track 5) (Chesky Records)