I have both DVE and Avia. I liked DVE for video calibration (color and geometry), but the audio calibration was horrible. DVE subwoofer audio signal was WAAAAYYYY off and I do not like a sweeping audio test signal (meaning the audio test signal sweeps from channel to channel).
I haven't used Avia for video, but the audio test signal is controlled by the user (meaning you choose when to transfer the test signal from one channel to the other).
I may not understand audio processing, but with my speakers in LARGE (my preferred setting), I could not send the .1 LFE signal to my subs - this was a let down for me.