If you don't want a 1440p monitor, here is a build with three 23.6" Asus monitors
PCPartPicker part list:
http://pcpartpicker.com/p/3GUgo
Price breakdown by merchant: http://pcpartpicker.com/p/3GUgo/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3GUgo/benchmarks/
CPU: Intel Xeon E3-1230 V3 3.3GHz Quad-Core Processor ($244.98 @ SuperBiiz)
CPU Cooler: Cooler Master GeminII M4 58.4 CFM Sleeve Bearing CPU Cooler ($30.40 @ Newegg)
Motherboard: Gigabyte GA-H87N-WIFI Mini ITX LGA1150 Motherboard ($110.98 @ SuperBiiz)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Newegg)
Storage: Crucial M500 120GB 2.5" Solid State Disk ($66.99 @ Amazon)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($83.97 @ OutletPC)
Video Card: Asus GeForce GTX 780 Ti 3GB DirectCU II Video Card ($689.99 @ Amazon)
Case: Corsair 250D Mini ITX Tower Case ($84.99 @ NCIX US)
Power Supply: XFX XTR 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($109.99 @ NCIX US)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Monitor: Asus VE247H 23.6" Monitor ($119.99 @ Newegg)
Monitor: Asus VE247H 23.6" Monitor ($119.99 @ Newegg)
Monitor: Asus VE247H 23.6" Monitor ($119.99 @ Newegg)
Total: $1942.23
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-09 16:01 EDT-0400)