Custom water cooling kit? Or pre-built water cooling kit? The only drawback from water cooling is it leaking, if it leaks then your screwed and no warranty on things you've lost, quite expensive. Pre-build water coolers actually don't perform as well as high performance air coolers like the one I listed, the water coolers are mainly for looks and bragging but there isn't a difference between pre-built water coolers and high performance air coolers. If you go for a really expensive air cooler, expect extreme performance, quietness, And a huge warranty period. Water coolers have pumps so they can be quite noisy and if your case isn't the right size for the water cooler it will be extremely difficult to fit (best to have a monster case). You will have to modify some cases to fit in the cooler you want and that is a defiant drawback. Same choice for me, either a Corsair H110 Water cooler or Noctua NH-D14, Easy choice, air cooler all the way but this air cooler is HUGE, takes up lots of space and looks better then a water cooler in my opinion, ultimately your choice but tampering with a case to make it fir isn't ideal.