By far the cheapest price I have ever seen for this! Currently for sale at PCCG for $449 + Delivery.
The NZXT Kraken Z63 280mm AIO cooler features a 2.36" customizable round display capable of displaying 24-bit colour for personalisation of your CPU cooler. Comes with two Aer P fans designed for liquid cooling performance.
Use whichever give you the most cash back.