I always use enermax power supplies and consider them to be quiet But i am an older guy whose ears have heard too much rock and roll, lol. So whats quiet to me may not be to you! The one in my day to day computer is an enermax whisper. No use pointing out the model as you likely cant even buy the same model now, you would be getting a newer model.
I suggest you check out a few places, perhaps using google, for suggestions.
One place you could go to is Tomshardware, you can google that as well. These kind of websites have info on current available units, not like my 5 yr old.
Course others here will have newer units than I do!
Good advice + great people = tek-tips