Your Go to CD to Impress

Depends on the person: for a Baptist minister friend I played the Messiah; 
for a young guy who wanted soothing strings, a Mozart string quartet; 
for someone who liked it lively, Armik, the neo-flamenco guitarist;
for classical nuts like me, either the Bach B minor mass; or to check out the bass, Rachmaninoff Symphonic Dances...
Any random person? James Taylor. 

Try to find a CD or record they love or already are familiar with.  Then blow them away with how it sounds on your system!

2nd,

Diana Krall- Live in Paris

Tricycle by Slim and the BB'S. Followed  by Brothers in arms (Dire Straights) 

Well, I always reach for The Rite of Spring conducted by Eiji Oue on Reference Recording
(RR-70CD). Very dynamic - Powerful - Engaging!

+1
For someone not familiar with the Rite of Spring it might not mean much, but if you are.....prepare to have your socks knocked off by this recording!