Go to eXtreme Power Supply Calculator Pro v2.5 and get the Pro version. Enter all your components, including planned expansions, set the Motherboard to High End - Desktop, set the CPU Utilization (TDP) to 100%, set System Load to 100% and Capacitor Aging to 30% and press the Calculate button. Add 10 - 15% to this Wattage for safety and note the required amperage on the various rails (+3.3V, +5V and +12V). Based on these figures, select a good GOLD or PLATINUM label PSU, that meets the total wattage and the amperage on each rail. It is your best guarantee for long and reliable, trouble-free editing.
It is a myth that a big PSU uses more electricity than a small PSU. If the system needs 600W to run, a 650W PSU will use 600W and run at 92% of its capacity. A 1200W PSU will draw the same 600W from the wall outlet, but runs at 50% of its capacity. It is comparable to a Formula 1 race with a safety car situation. Bernd Schneider in his Mercedes AMG safety car will run at 92% of its capacity, the Formula 1 cars run at 50% of their capacity.
Corsair Hydro coolers do not give better cooling performance than air coolers from Cooler Master or Noctua, nor do they run quieter. They are only more expensive. Don't forget that air coolers in push-pull configuration have two fans, that are replaced by two fans on the radiator when using a Corsair Hydro. Unfortunately, the Corsair fans are pretty noisy, thereby defeating the intention of water cooling to make things more silent. Effectively, one replaces two fans with an average noise level of 25 dB with two radiator fans with 35 dB. If the cooling performance was better, that extra noise might be overlooked, but that is not the case. Up to around 4.8 GHz overclock, the performance difference between air coolers and Corsair Hydro is negligent. So, if you opt for Corsair Hydro coolers, you don't get better cooling, you do get more noise, more power consumption (because of the waterpump) and you spend a lot more.