I'm not in the favor of changing the cpu and the monitor.
CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ Amazon)
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard ($189.99 @ NCIX US)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($74.99 @ NCIX US)
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($132.99 @ B&H)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($82.99 @ NCIX US)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card ($699.99 @ Microcenter)
Case: NZXT Phantom 410 (Gunmetal/Black) ATX Mid Tower Case ($81.76 @ Mwave)
Power Supply: Corsair Professional 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($89.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($14.99 @ Newegg)
Monitor: BenQ XL2420TE 144Hz 24.0" Monitor ($296.99 @ Amazon)
Keyboard: Razer BlackWidow 2013 Wired Gaming Keyboard ($84.99 @ Amazon)
Total: $2059.66
Please keep in mind that it is a gaming rig.
CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ Amazon)
Motherboard: Asus Maximus VI Hero ATX LGA1150 Motherboard ($189.99 @ NCIX US)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($74.99 @ NCIX US)
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($132.99 @ B&H)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($82.99 @ NCIX US)
Video Card: EVGA GeForce GTX 780 Ti 3GB Video Card ($699.99 @ Microcenter)
Case: NZXT Phantom 410 (Gunmetal/Black) ATX Mid Tower Case ($81.76 @ Mwave)
Power Supply: Corsair Professional 750W 80+ Gold Certified Semi-Modular ATX Power Supply ($89.99 @ Newegg)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($14.99 @ Newegg)
Monitor: BenQ XL2420TE 144Hz 24.0" Monitor ($296.99 @ Amazon)
Keyboard: Razer BlackWidow 2013 Wired Gaming Keyboard ($84.99 @ Amazon)
Total: $2059.66
Please keep in mind that it is a gaming rig.