Two SFX-L power supplies which BeQuiet announced back at Computex 2017 are now available for purchase. They are fully modular, use Japanese capacitors, and have up to 92 percent peak efficiency. They can be yours for US$119 for 500 W or US$145 for 600 W.
https://www.notebookcheck.net/Two-new-fully-modular-SFX-L-PSUs-from-BeQuiet-are-now-available-for-purchase.245766.0.html