Hexus posted a review on the NZXT Kraken X63 RGB
A quote from the article:
Handsome 280mm AIO. The commonality of AIO coolers sourced from a handful of OEMs all but ensures there's no such thing as a bad all-in-one. There's little to fumble in a closed-loop solution comprised of radiator, tubing, CPU block and fans, yet when picking the right cooler for your next build it is worth contemplating each manufacturer's area of expertise.NZXT Kraken X63 RGB Review
be quiet! and Fractal Design insist on keeping noise levels down to a minimum, EK tends to put the emphasis on maximum performance, and Corsair typically finds a happy medium. You can't really go wrong with any of the aforementioned, but if you want an AIO that looks particularly swish, NZXT's Kraken offerings are well worth closer inspection.