XFX P1-650X-XXB9 650W, I dunno how much they cost where you are at, but might be a cheaper option for you. Here is a review of one.
For the debate on the All in one liquid coolers vs custom loop.
Custom loops are far superior in performance. The all in ones are nice to have a plug and play option. They offer good performance as well. Custom loops are entirely different beast though.
I have personally used the Antec 920 AIO water cooler. It works good at high fan speeds. My custom loop however is nearly 20c cooler at full load temps. My loop right now is a XSPC Raystorm Block, D5 pump, XSPC RX 240 radiator (push with Corsair SP120s 23db), Alpha Cool UT45 280mm radiator (push/pull with XSPC 140mm radiator fans 29db) , EK 7950 Gpu Block x2.
Even with both gpus in the loop MY cpu is 20c cooler than the Antec 920(extreme fan profile max speed, 55db). It is also quiet. 29db being the loudest fan, compared the 55db extreme mode on the 920.
Granted my loop is rather expensive as i have two gpu blocks, and 2 radiators. You can get similar performance with a good 240 radiator in push/pull fan configuration with only the CPU in the loop. Most reviews put the 920 = to a H100. A simple XSPC raystorm kit such as this one
Far better than any of the all in one systems.