hello guys i just found this deal on massdrop i can get the aune x1s and x7s for 400$ or the x1s for 200. I currently have the hifimam 400i and the sony mdr z7. I use my htc 10 to drive them but it lacks the power to drive my 400i do u think this a good deal ? Or can i find something bettet for 400$. i dont want to spend more money honestly that the max my budget cam handle , and i dont trust used units. Thanks in advance.