With closed WC loops such as Corsairs range I don't see why you would want to go air cooling? I would suggest getting a H100 or H100i and you wont need to worry about it, and maybe down the line get some better fans for the Corsair in push/pull.
If you are stuck on air cooling, get the Noctua NH-D14 which is the best of the rest when it comes to after market air cooling
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