Here's what, and why:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($279.99 @ Microcenter)
CPU Cooler: Noctua NH-C14 CPU Cooler ($73.00 @ NCIX US)
Motherboard: ASRock Z87 PROFESSIONAL ATX LGA1150 Motherboard ($254.98 @ Newegg)
Memory: Corsair 16GB (2 x 8GB) DDR3-1600 Memory ($109.55 @ Amazon)
Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ NCIX US)
Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ NCIX US)
Case: Cooler Master Storm Trooper ATX Full Tower Case ($144.99 @ NCIX US)
Power Supply: SeaSonic Platinum 1000W 80 PLUS Platinum Certified ATX12V / EPS12V Power Supply ($220.98 @ SuperBiiz)
Optical Drive: LG WH14NS40 Blu-Ray/DVD/CD Writer ($59.99 @ Microcenter)
Total: $3183.46
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-06-18 13:52 EDT-0400)
The 4770K & motherboard will give you the best performance now and into the future as more and more games include hyperthreading. The motherboard is top notch and will give you good overclocking.
The Cooler is a must. It blows down to keep your motherboard and RAM cool. This is a must for your motherboard's regulators will be getting hot as will your plain ram. In order to fit the huge cooler you can only use two ram sticks and they must be without heatsinks. This air cooler is as good as the best of the water coolers.
For a 3 way monitor setup, you need massive amounts of graphics power and a good dosage of VRAM. I hear that the most demanding games on three displays now can use up to 5GB of video ram. So, for a best of the best system, you need the mighty Titan with its shameless six GB of video ram. Two of those will make any game smooth on three displays.
The case is a nice one, the power supply is about the best there is.