I used the Avia disc with pretty good results.
The calibration steps that involved use of the color filters was an important piece of the set-up process; so if you buy the disc second hand, make certain they're included.
Apart from that, it's pretty surprising how well the THX optimizer works that's included on some DVDs (such as "The Incredibles"). If I recall, there is a black setting test on the optimizer.
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Outlaw 970
McCormack DNA-125 (mains), Emotiva LPA-1 (surrounds)
Quad 11L (F&C) Wharfedale (R) LFM1 (Sub) w/ SMS-1
Squeezebox -> Behringer SRC2496 -> Musiland MD10 DAC
Sota Sapphire; Marantz 10B;
Video: Hitachi 42HDS52A; Oppo 971H
System Pics