i have pha3 and i am thinking about getting x7 mk2 as a storage brick
imho personal audio is subjective.
i borrowed pha3 from time to time since 2016 and recently managed get a new one for around 570$~. can't be more happy.
i tried x7 mk2 locally (yeah, we have local fiio resellers) and result is good but i still could hear 'background noise/static noise/call it something' with sensitive IEMs (yeah, probably will be better if i get amp which specific to iems) which drove me nuts.
but again. software issues? i could not make demo x7 mk2 (older firmware) pair with pha3 over usb. i mean i could not pair x7 mk2 demo with any device over usb.
that is one of the reasons i would want to use it with pha3.
other one is that it sounds different from sony's full fledged amp. would prefer sony amp any day. i like their implementations and how they sound.
i would still prefer to use it with pha3 due to versatility and being dead silent.