At the same price I found also the Fractal Design ION+ 860W, which apparently is better than the Seasonic PRIME PX-850 and has its own brand 140mm fan instead of the Hong Hua 135mm:
https://www.kitguru.net/components/power-supplies/zardon/fractal-design-ion-platinum-860p-psu-review/5/
https://www.kitguru.net/components/power-supplies/zardon/seasonic-prime-ultra-platinum-850w-power-supply-review/5/
What do you think?