I saw you also posted th-x00 review, can you be so kind to comment on comparison of these headphones with dacport slim and with grace m9xx. I really don't wish to spend 5 times more money for grace, but as I understand m9xx output resistance is 0.08ohm and dacport slim have 1ohm which make it worse synergy with th-x00.. But is it really much worse details/noise/soundstage? Really need your suggestion. Thanks in advance.