don't bother with crap coolers (AiOs).
your CPU can happily live with the stock cooler even slightly overclocked (4.6-4.8GHz).
there are not many reasons to do liquid cooling today.
the main ones are:
compact systems
silent systems
systems working in high ambient - over 30C
the look
or any combination of the above.
the overclocking potential is increasing by 100MHz between good air cooler and good custom loop. so this part can be ignored as 100Mhz do not make any difference in real life usage.