Although the NZXT Hale is a good unit; the efficiency of the seasonic unit is much higher (88% / ~92%/ 87%) compared to (~85%,87%,86%) of the nzxt unit.
Both the Seasonic X and the Nzxt kingwin based units are good psu's but i'd still prefer the seasonic if you go with the high end stuff because it's seasonic... nuff said.