The EX1000 is just different. The PP6 and SA-43 are as spacious, but the EX1000 reminds me of headphones due to the across the head soundstage coherence, which isn't as good as CIEMs. Also, with your last statement of the EX1000 being too harsh, that makes me want to steer you to the Rooth product lineup which is smoother and more liquid than the Hidition products.
I just think EX1000 has a very bright treble but not quite refined. It won't bother me if NT6Pro has a very bright treble. But it will annoy me , if NT6Pro sounds unrefined.
EX1000's harshness is also due to its thin midrange. Imagining of EX1000's midrange also isn't good enough. I guess NT6Pro's midrange and treble won't be worse than those of EX1000.
Edited by Alias Gu - 5/19/13 at 10:17pm