Here's a suggested ~$2200 CAN build:
Used i7-6700 (6th-gen Skylake) as you won't overclock and you are using Windows 7 (the 7th-gen Kaby Lake only works with Windows 10). Although the included Intel stock CPU cooler will be fine, I had it replaced for a more quiet one for an affordable price.
Got the B150M (mATX size) motherboard as you will only use a single GPU, more affordable, and still can support all the connectors that you will generally need. Got the 16GB (2x8GB) RAM modules as Windows 7 (Home) might not support more than 16GB of RAM. The larger RAM capacity would be beneficial for your editing work.
Suggested a storage capacity system (depends on your preference, of course). Generally, the 250GB SSD would serve as your system drive and programs/applications. The 500GB SSD may serve as your "working drive" with transfer speeds with the 250GB SSD as fast as it should be. There would be enough space for a lot of games you also wish to install in the 2nd SSD. The 3TB HDD (5400rpm) can serve as your general storage/database or backup drive. It can also accommodate some seldom-played games if you wish.
Video card is GTX 1070 to complement the 1440p/60Hz monitor resolution/refresh rate you would be using. Case is a good-quality mATX, enough space for good airflow, aesthetics, and possible DVD/CD/Bluray drive bays if you so wish to install.
Got a high-quality (7-year warranty) EVGA SuperNOVA G3 PSU, with more than enough amps/watts (~550W) to power your entire system with headroom for future expansion.
The monitor is what you prefer, at 1440p/60Hz. I picked an IPS which is great for the type of work you will do. It has relatively low input lag (4ms) which may be suitable for casual gaming.
PCPartPicker part list /
Price breakdown by merchant
CPU: Intel Core i7-6700 3.4GHz Quad-Core Processor ($393.23 @ Vuugo)
CPU Cooler: be quiet! Pure Rock Slim 35.1 CFM CPU Cooler ($23.97 @ DirectCanada)
Motherboard: MSI B150M BAZOOKA PLUS Micro ATX LGA1151 Motherboard ($94.50 @ Vuugo)
Memory: Kingston HyperX Fury Black 16GB (2 x 8GB) DDR4-2133 Memory ($142.00 @ Vuugo)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($119.98 @ DirectCanada)
Storage: Samsung 850 EVO-Series 500GB 2.5" Solid State Drive ($219.99 @ Newegg Canada)
Storage: Western Digital Blue 3TB 3.5" 5400RPM Internal Hard Drive ($113.00 @ Vuugo)
Video Card: EVGA GeForce GTX 1070 8GB FTW Gaming ACX 3.0 Video Card ($549.98 @ DirectCanada)
Case: Corsair 350D Window MicroATX Mid Tower Case ($118.98 @ DirectCanada)
Power Supply: EVGA SuperNOVA G3 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($109.99 @ DirectCanada)
Monitor: Acer G257HU smidpx 25.0" 2560x1440 60Hz Monitor ($358.98 @ DirectCanada)
Total: $2244.60
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-03-22 00:31 EDT-0400