I know this is way off topic talking about coolers ! Say you had £60 to spend I have seen 2 AIO - Cooler Mater Liquid ML240L - GameMax Iceberg 204RGB - or just buy a Wraith Prism for £20 from OC?
ARCTIC Freezer 33 eSports ONE is £25. The 2 fan version (34 duo) is £35. I'd get either of those instead of a £20 Wraith Prism. I'd only say go for Prism if you can find it for £10. Personally I dislike AIOs so I can't recommend any.