Anything i should improve here?
Current Build. I know GPU is outdated.
PSU Seasonic 620 Bronze
8x2 Corsair Vengeance Series 16gb
Motherboard: Gigabyte GA-Z77x-UD5H,
Samsung 850 Pro Series MZ-7KE512BW 512GB 2.5 inch SATA III SSD
Samsung Spinpoint F3 1 TB HD,
Das Professional Keyboard
CPU Cooler Hyper Cooler 212
VGA EVGA GTX 670
Intel Processor i7-3770k
Antec NINE HUNDRED BK Case
Asus VE247 Monitor x 2
Logitech HD Pro Webcam C920
Logitech G400.
Budget for upgrades: $2000
Main Use: Mostly Gaming (5) , Video Editing (3), Streaming Games (4)
Monitor Resolution: 1980x1080 the norm. Are you buying a new monitor? Not sure should i?
Total War Series allow the game to run with 6 players with full armies 60fps, Fallout 4 , Just Cause 3, all the new stuff best settings

. 60 FPS preferred. How important is PhysX / SuperSampling / CUDA to you? Not sure what that stuff is.
When will you build?: Whenever i get the necessary parts.
Will you be overclocking?: No, since i don't know the safety and requirements to do so.