After a little while of listening with the Q701's, I'm not sure what to think really. The vocal soundstage is fantastic, some songs make you feel like you are in the front row at a live performance, but I'm finding the highs to be a bit shrill and incredibly fatiguing. I don't find them anywhere near as relaxing as the X1.
When listening to something like cosmic love by Florence and the machine or this is war by 30 seconds to mars I find myself turning the volume up to enjoy the vocals, and then turning it down again when the instruments kick in because it is headache inducing.
Using an Essence STX, no EQ's or effects, just clean sound. All the music is lossless and being played through Foobar or Songbird with no EQ's or effects.