Oh almost forgot!
The DCU II cards are very very fat, you can *just* fit two on the motherboard you picked.
But I bet the bottom one will choke a bit and heat up.
I would get EVGA ACX if you are going to SLI, slimmer and not as effective (temp wise), but work better in SLI.
The reference cooler is another that works well in SLI.
You want something which sucks in from the front and shoots it out the back.
Also to elaborate on what I said before:
With 144Hz monitors, you are only going to notice a difference at >60fps.
http://www.guru3d.com/articles_pages/geforce_gtx_770_sli_review,22.htmlhttp://www.guru3d.com/articles_pages/geforce_gtx_770_sli_review,23.htmlWith 3 1080p monitors, as the article above shows, you'd be lucky to get 60 fps, let alone higher.
You either have to go insane with 3 x a high end card (probably 1-2k by themselves) and still only really be pushing 70-80 fps. (+ you'd need a extreme mobo tbh)
Or, you get 3 x 60Hz monitors and save a bundle ;).
Are you set in stone on having 3 monitors?
You could just get a 4k 30+ inch monitor, probably the same price.
As for watercooling the setup, you'd be able to have a stable high OC on your CPU e.g. 4.4GHz.
You'd be able to OC the cards to ~1.1GHz GPU, 7.5GHz effective memory
With this you'd stand a chance of 60+ fps in most games, while running nice and cool

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EDIT:
Just saw you posted

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I meant 2 x GTX 770 4gb for 3x 1080p.
A GTX 780Ti should be able to run 2x 1080p 60Hz screens fine.
Watercooling wise, it's tricky as fuck, a pretty dedicated option. If you can do it, it's amazing.
You'd watercool the CPU and GPU, nothing else really needs it.
What you've currently selected should be fine though, that's a great card, should run pretty cool (sub 70C) with the right fan settings.
The H100i is a closed loop watercooler for the CPU, so that would be very close to custom watercooling.
The screens are still 144Hz (not sure if intentional), you could run one 144Hz with this setup, but not two. (Justifiably anyway)
The SSD might be cheaper on amazon, they recently plummeted in price as the next series is due out soon. (Just picked up a 500gb one for £160, not too shabby)
Other than the keyboard, mouse and headset (seem a tad expensive, but you said no changing D:), it's one beast of a setup! (I'm jelly)