How old is your PSU? my modxstream pro 600W blew up last saturday after 1 year of non intensive use. You should get a better quality 650w at least.
there are plenty of people who have had good quality corsair and antec PSU's blow up after less than a year of use also. It happens to every manufacturer. Dont judge a brand from one faulty product, and it may have been an environmental fault too, not a manufacturing fault. Power surge, dirty power, dusty environment, cockroach shorted it out, etc. etc.