There are several great power supply makers but, if you want a quality unit that will work, trust SeaSonic. I make servers for many companies, I always tell them to use SeaSonic but, still allow them to make the choice. I have never had a SeaSonic power supply fail.
People should realize that the power supply is the most important component in a system.
SeaSonic is the best.
As for favorites I like the SeaSonic X750 Gold because it is priced within my purchase ability and works on servers too.
I have a lot of respect for Seasonic's excellent power supplies. One of my favorites was an old 460 Watt model that I bought years ago and it is still going strong today operating under a heavy load of video cards. It was when I bought my first really fast video card and blew out my cheap underrated PSU that I first understood the importance of investing in a well designed power supply.