Bitspower releases two DIY Series Soft Tube Kit series named Touchaqua, these can be mounted without difficulty in standard middle tower PC case. The kits are full liquid cooling sets with separated components and are based on a 240mm radiator.

The tubing used thus is soft, easy to handle even for beginners,  Bitspower will release the series in a SKU for AMD processors, and includes a water-block. Obviously there is also a kit for intel mounts. Included is coolant, a radiator, 240 mm slim and two 120 mm fans with a built-in addressable RGB LED. The pump is integrated into the reservoir also holding addressable RGB LEDs. In addition, Y-shaped fan cable, Y-shaped RGB cable, as well as an addressable RGB LED controller, are all included. 

Pricing of a complete kit sits at roughly 239 USD, which for a standalone kit incl RGB controller is not very expensive. You can find more info here (Intel) and here (AMD).