So, after so many years with 655, Alphacool, german manufacturer, has released a new generation of water pump. Not only it looks cooler than the predecessor but it offers wider possibility to regulate the speed. It is also quieter.Here is a review:

http://www.xtremerigs.net/2016/10/31/alphacool-eispumpe-vpp755-pump-review/

http://www.alphacool.com/media/image/df/12/9c/1012423-2.jpg