Just for fun, I created a configuration that I would build for myself if I had a spare $5,000:
display: X34 Predator (g-sync) ~ $1,200
GPU: 2 x GTX 980 Ti = $1,400
memory: 64 GB DDR4 RAM = $600
MB = 300
PSU: EVGA G2 1300 = $200
Storage: Intel 750 1.2 TB = $900
CPU: Intel i7-5960X = $900 (micro center)
case $100
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$5,600
Addendum: I forgot the cpu cooler. If air, I'd get the becool dark rock 3. If water and at the $100 price point, I'd get the Corsair H110i GTX. At the $200 price point, I'd get the EKWB Predator 240.