Honestly, don't get a closed-loop water cooler.
I'll give you some reasons why they've bad vs a normal air cooler:
1) They have way more moving parts. This makes them a LOT more likely to break, as they have many more things that can break
2) When they DO break, you're screwed. Unlike a normal cooler, you don't have a giant metal heatsink left if the moving parts do stop moving, so your CPU doesn't have time to downthrottle properly.
3) Should it fail catastrophically, instead of denting your case with a flying plastic bit, it spews liquid everywhere. That's bad.
4) They're noisier than a comparable air cooler, because the fans have to work harder because the heatsink is denser.
5) You get the same cooling performance for CHEAPER by buying a good air cooler - the Silver Arrow or Noctua D14 are both amazing options.
ALSO:
What is the intended use of this computer? If it's for gaming, you're wasting a LOT of money that could be better spent - if it's not for gaming, you're still wasting a LOT of money that could be better spent.
There are a lot of mistakes with this rig, bad brand choices, and overkill in ways that gets you no benefit whatsoever.