seems like i have used avia and it doesnt offer support for dvd-a, etc. or at least the version that i had didnt. digital video essentials is typically viewed as cream of the crop, but i have not used it seeing as i was only interesting in calibrating my video and avia did a fine job for that. now that i have my denon 3805 i dont have to bother much with setting up the audio, unless i merely want to tinker.