If I wasn't clear on my previous comment - it was regarding
@golov17 question about K's 500ohm subass, with a side note to EO320. To explain further, I think EO320 is a good overall sounding package, but didn't quite have any particular wow factor to its sound, or perhaps another way of saying it will be that the best part of EO320 is that it doesn't have any particular short end. Where K's strength and what sets it apart are its rumbling deep end and an immersive / enveloping soundstage.
My main listening gear these days are FiiO X7 (mostly AM3's single-ended output), ShanLing M1, Sony A15 (digital-out to OPPO HA-2), or FiiO X5II (digital-out to Chord Mojo). Don't really do much listening on desktop gears. But as far as portable gears go, I think it is fair to say I am quite happy with what I have.