x5 II for 110usd is a bargain, I would buy this. About others, fa1 is out of budget (240 usd on Penon)
xs01 is 100usd and sounds great (I have it) but is ok for pop rock, trance or any genre with rhytmic patterns, with ambient electronic with lot of bass sound it produces a weird ticking very annoying, same as ivan tt told about fa1, so avoid if you like ambient or any rhytm-less genre.
xs02 is 145usd, is evolution of xs01 and I guess (or hope!) they solved the ticking issue.
I don't know Zishan dsd.
I may suggest Aigo Moonlight Z6pro, 112usd on Joybuy or 160 usd, with discount coupon, on Aliex where I bought it (at the time I didn't know about Joybuy...) Sounds great with beautiful mids, crisp highs and powerful bass, and has plenty of power to drive almost everything. Or the Z6, 112usd on Aliex or 90 on Joybuy. Compared to the Z6pro, it has not Line out, cannot read dsd256 and has a different DAC (Cirrus Logic instead ESS Sabre of the z6Pro)
But, as told before, I would get the Fiio...