I think it would be sufficient to say that it is unlikely this rig will ever draw more than 900W.
IMO, go overkill in the right places with extreme rigs, and the CPU/GPU/Storage isn't the place to do it. Go overkill on the case, cooling and monitors.
So get something from MountainMods/Caselabs or a higher end case like a SIlvertone TJ11, Corsair 800D or Coolermaster Cosmos II. If your truly nuts, the Cross Desk by Red Harbinger. A nice custom water-loop and some large IPS displays.
Because there's not much point spending a ton of money on things like processors, graphics cards, RAM, Storage (to a lesser extent, HDD's don't seem to be going anywhere quickly) because within three years guaranteed it will be outdated and obsolete. These parts you will have to perpetually upgrade to keep up with current standards, so there's not much point sinking a ton of money in them in the hope they will last longer.
The case, cooling and monitors, they will outlast the rig by years. I got a 1080p monitor when they were relatively new, and I still use it to this day. Its been hooked up to graphics cards ranging from a 8800GT to my current 7870, just to give perspective on how long it has lasted.
A case is a solid hunk of metal, it wont become outdated. Get a good case and it will last you multiple builds until you eventually get rid of it just because you want a different, not because you need a different one.
Cooling (especially Custom water) is very adaptable, make a good loop and you can keep using those parts for as long as they physically hold up. Plus, Custom water is so much better than the CLC cooling youv got on there.
Get a reasonable rig when it comes to "Core" components (CPU,GPU,RAM,Mobo,Storage) and go overkill everywhere else. Theres no point spending a ton of money on the core components, because more performance wont make it any better to use unless you actually need that performance.