Just because a PSU has higher watts doesn't make it more reliable. You need to see how many amps on the 12v rail it has; the reputable / good brands have high amps and are built well.
Sorry, didn't see that he was referring to a specific PSU; thought he was just saying that it would be better just because it's 750w. Woke up from a nap when I posted that lol; was apparently still a bit out of it.
Yeah, I have a 520hx as well that's powered my system (stock and OC'd) for a couple years now without issue.