It is important to realize that even the top end closed loop all-in-ones are often outperformed by their air cooling counterparts. Ex: 212 EVO = H100 < Noctua DH-14 = Thermalright Silver Arrow
For some reason, even though many reviews show otherwise, people still believe AIO to be an overclocking godsend - far from it.
Evo= great price/performance cooler
H series and AIO= equal to or worse than top end air coolers
Top end air = almost as good as full custom loop
Custom Liquid loop = excellent balance of quiet and performance together, but expensive starting at 300usd for CPU loop