CD's= Ludacris- Red Light District (TONS of bass, as well as great mids and a steady mix of musical instruments)
Lil Wayne - Tha Carter I and Tha Carter II ( Bass again, variety of sounds and can see how quickly your sub can recover in between hits)
Stevie Ray Vaughn - ANY Guitar, enough said, the tell all tale of what a system can hit and where its high points and low points are
DVD's=
Fast and the Furious= Both for the car sounds, guns shots, as well as good music in it
War of the Worlds - Everything, guns, robots, explosions, perfect for Bass heads
Master and Commander- Cannons, the sound of the sea, bells,
Hero- Sword fighting, slicing of the wind noises, etc
Days of Thunder - Race track sounds great
All the New Star wars (and the remasterd ones)