Hi, I don't know what to do, I have Xonar Essence STX (2xMUSES8920 + 1xMUSES8820) and HD650, want to improve sound quality, what is better for upgrade? I can buy Magni 3 for Essence STX + 2 x op-amp Burson V5-D or don't buy op-amp from Burson and just take Schiit stack Modi 3 + Magni 3? Someone...

Heya! I currently have a ASUS Xonar Essence STX soundcard (stock OPAMPS) and Beyerdynamic DT 990 Premium (250 Ohm) and I'm pretty satisfied with the sound quality. There's no static noise and I don't mind the treble of the 990. I've been researching for my next audio upgrade and I'm considering...