I believe everybody here is spot on w/ the GPU. I wouldn't spend that much money on a titan either as there are other options that provide great value.
The big kicker with my recommendation is the fact that DirectX12 is coming out "soon." What they're saying is DX12 can utilize VRAM in both cards in an SLI setup. Meaning you won't have to buy a titan to get 6gb of VRAM and could get 2x 970's (@ 3.5GB VRAM EACH) to match at 2/3rds the cost (not the best apples to apples comparison, but will save you lots of money for small sacrifices with 1 more GB of VRAM).
With that in mind, I would buy a decent middle of the road GPU to tide you over a year or two (perhaps a 780 or something). In a build, the Mobo/CPU are basically the bottlenecks, look to upgrade your GPU down the line as GPUs are rarely top notch for over a year. If you want to go crazy, go SLI at this point. Your GPU will then most likely rev up your system making the CPU your new bottleneck--meaning you've effectively got the most out of your build.
If you have a MicroCenter near you, BUY YOUR GPUS AT MICROCENTER (pay attention). Spend the extra $30 on their year long service protection plan...I never do this ever except at microcenter...why? Because when you spend that $30, you have up to a year to return the card to the store and they give you the full cost of the card back in store credit no questions asked. So when the new GTXs come out within a year that cost the same as your old card, you basically are out $30 for the service plan and BOOM upgraded card (Save your boxes obviously).
Seem like a scam? Seem stupid? Don't believe me? Ask any employee who works at MicroCenter and they will nerd rage on this plan so hard it will make you uncomfortable.
Another thing I would do differently is the Power Supply. I noticed you're going w/ the Corsair Radiators which are amazing. I added the H80 to my rig a little while back to overclock my 3770k and I easily got another full Ghz out of it stable at 60C. I think I could push it more, but I really don't know how much because I don't know how much room is left on my power supply--which brings me to my next recommendation.
If you're into treating computers like a race-car like I am, you're going to want a PSU where you can monitor power draws to various components. Corsair HX850i offers that. With their Corsair Link software you can monitor your PSU, Radiator, and program each component for different scenarios. If you get a Corsair case, you can also program the fans. Look into it --- I highly recommend it. It's $70 more than what you're looking at buying now, but believe me it is worth it in the long term if you're going to be saving money by not buying the TitanX.
If you ask me the time, I will build you a clock. I'm excited for you -- Have fun w/ the build!
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