Wait for 3.6GHz Haswell E to come out, compliment it with DDR4 RAM and X99 MoBo (they won't support anything else anyways). Get Razer gaming peripherals. A H110/H100i with a Corsair/ Fractal or any other full tower of your choice.
Go for 1TB SSDX4. Get the R9 295X2 X2 Cards for CF. 16GB DDR4 will be good. Or maybe wait for 800 series to come out so you may tri SLI the best of 800 series (most probably the 880) for 3 monitors. You can even go with 3 4k systems and R9 295X2 Tri-CF, but with extreme heat management.
You can even get complete racing 5X 2k display setups for the most immersive experiance.