The corsair AF fans are meant for case fans and their prefixes indicate
Air
Flow. SP or Static Pressure fans are your friends when you're dealing with high density fin arrays or tightly packed fins on a heatsink. I would suggest looking into Swiftech's Helix, EK Vardar and Nosieblokcer E-Loop fans for your AIO radiator and if you want color you could paint them over as per instructions set on
MNPCTech's Youtube channel by Bill Owen or you could go with Bitfenix's Spectre pro's.