Any opinions on a NFB-10SE to go with these?
Yet to hear anything Audio-GD outside of the NFB-5 ~ but if it's anything like that Dac/Amp combo then
it should be quite nice with the K701.
Although this could be a worrying warning for sibilance and brightness from Audio GD themselves
on the NFB-10
"The NFB-10ES is best matched with headphones which have neutral or warmer side sound characteristics."