Problems about Case vs Water cooler

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Hey, I'm new in the forum, If I do any mistake, be considerate and forgiveme. (btw, my main language is not english).

 

I will build a system pretty soon, and I have everything in mind, but I'm having problems to think which case I will buy, and a water cooler to fit together.
This is my specs:
E5 1620 v3 -> someday upgrading until i7 5960x
Asus X99 Sabertooth

Corsair DDR4 4x4GB 2133gHz

Graphics I will late until Fury X2 is released, then in first instance I'll put one, later on will put in 4-way.

Seagate 1TB x4 raid 0

Samsung pcie x4 M.2 SSD 128GB

Corsair Full Modular 1000w (or 1200w IDK about Fury X2)

 

Now the trick question: I really liked the Thermaltake Core P5 to mount my PC, and predicting that the Fury X2 would have a 120mm radiator too, would this case handle 120mm x2 (from the graphics) and plus one 240mm cpu cooler (I accept suggestions about 240mm AIO water coolers, I haven't seen a good 2015 review/comparasion)?

Besides that, a pcie cable to connect the video card to the motherboard would meke it slower in some way?

Last question, I promise: Will a open water cooler be better? Is it too hard to a begginer to build in it's own?