You might also try some music. I was listening to Date Matthews and Tim Reynolds last night after I finished some work, and the 5.1 TrueHD track is quite good.
When I get some time I thought about running the OPPO directly into the amps to see what removing 6 audio cables does for improving the sound.
I've seen differing opinions on this approach. OPPO doesn't recommend it for folks wanting best sound quality because of the way the volume control works inside the player. On the other hand, I've seen folks do it with high end gear (there was even a very pricey speaker manufacturer at a trade show last year using a 983H directly into amps and to speakers).