Need advice : Asus Xonar Essence Vs Beresford 7520? Which one is the best (SQ) for music and movies (leaving the usabiity feature of a separate dac)? Planning for 7520 (a group buy is active in this forum). If Asus is having better SQ, then i will go for that (i am already having an htpc). If there is a difference then please explain how much, is it marginally or significantly and in which area?