Hello, I am looking for a good dac/amp or sound card that will give me good audio. I am using the superlux hd681 evo's with a modmic. I have looked at the fiio e10k, the s.m.s.l m2 and the asus xonar dgx. I have been leaning towards the asus xonar dgx because it gives good positional audio but if anyone has better suggestions then please tell me. Thanks