blindly go for seasonic it is the leader in terms of quality,only 1 or 2 foreign brands (super flower etc) come close to the quality offered by seasonic psu
the difference in price is high buy completely justified
take it like this
cooler master -1 out of 500 psu will fail within 5 years(and fry some other parts)
seasonic 1 out of 10,000 will fail within 5 years