For testing classic music I would suggest Smetana's "Ma Vlast":
http://www.youtube.com/watch?v=kdtLuyWuPDs
Film Score: Hans Zimmer - The Dark Knight: "Why So Serious?"
http://www.youtube.com/watch?v=-QjuEWsdgEc
Electronic/ I.D.M.: Aphex Twin - "On"
http://www.youtube.com/watch?v=47ZmvhGPkWc
Trip-Hop: Massive Attack - "Unfinished Sympathy"
http://www.dailymotion.com/video/x5svr_ ... athy_music
Classic Rock+Soul, old recordings: Ike & Tina - "Proud Mary"
http://www.youtube.com/watch?v=8d3kq-AT_CA
Classic electronic, old recording: Kraftwerk - "Autobahn"
http://www.youtube.com/watch?v=AcKzJkWDwBo
Synthie/Rock/Ambient: Dr. Stephen Baysted - "Spa 24 Hours"
http://www.youtube.com/watch?v=53Q_PCxAoIE
Nu-Metal: Sonic Mayhem - "Descent Into Cerberon"
http://www.youtube.com/watch?v=ALBKFB28E0M
Grunge: Nirvana - "Lithium"
http://www.youtube.com/watch?v=XaSmr9c_qvA
Live/Accoustic/Rock/Pop: Pink Floyd - "Wish You Were Here" (Pulse live recording)
http://www.youtube.com/watch?v=UTeXkHfWYVo
Pink Floyd - "The Great Gig In The Sky" (Delicate-Sound-Of-Thunder live recording)
http://www.youtube.com/watch?v=V7NyO9NPZbQ
Live/Electronic/Rock/Breakbeat: The Prodigy - "Firestarter" (live)
http://www.youtube.com/watch?v=LQ-UuXzqN6I
Acid: Humanoid - "Stakker Humanoid"
http://www.youtube.com/watch?v=BK2U5ziV_Z8
Electronic/House/Funk/Strong Precompression: Professor Kliq - "Plastic and Flashing Lights"
http://www.youtube.com/watch?v=oSbljg7OcCU