Honestly I would suggest checking this site out
http://domituscomputers.tk
They have this system for $949
CPU: Intel Core i5-4690 3.5GHz Quad-Core Processor
Motherboard: ASRock Z97 Anniversary ATX LGA1150 Motherboard
Memory: G.Skill Sniper Series 8GB (1 x 8GB) DDR3-1600 Memory
Storage: Sandisk Ultra Plus 128GB 2.5" Solid State Drive
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
Video Card: Zotac GeForce GTX 970 4GB Video Card
Power Supply: SeaSonic 620W 80+ Bronze Certified Fully-Modular ATX Power Supply
Operating System: Microsoft Windows 7 Home Premium SP1
Or make a few edits knock off the SSD (switch to just a 1tb hard drive) and switch to a R9 280 That makes it like $720ish That should be a much more balanced build for gaming/video editing/rendering. I am assuming since you are buying prebuilt that you most likely won't be overclocking. however if you want to you can switch to a k model and still keep it under budget.
Well I hope this helps best of luck with the new pc.