Building a video editing/YouTube/Twitch steaming gaming PC

hello I'm a first-time PC builder and I need to build a computer to fit my very special needs. I am a video editor/YouTube/l Live stream the basic use of the machine majority of the time will be to edit videos for my business and for YouTube I also lifestream a lot I want to be able to use OBS and all the bells and whistles that come with. I would like to start PC gaming and streaming I have a budget about $900 I needed to be on the LG 1150 socket this is my plan for the build so for and
PCPartPicker part list / Price breakdown by merchant

CPU | Intel Core i5-4460 3.2GHz Quad-Core Processor | $166.95 @ SuperBiiz
CPU Cooler | Cooler Master Hyper TX3 54.8 CFM Sleeve Bearing CPU Cooler | $19.98 @ OutletPC
Motherboard | Asus Z87-A (NFC Express Edition) ATX LGA1150 Motherboard | $93.89 @ OutletPC
Memory | G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory | $48.99 @ Newegg
Storage | Sandisk X110 128GB 2.5" Solid State Drive | $52.99 @ Amazon
Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | $52.49 @ OutletPC
Video Card | Gigabyte GeForce GTX 960 4GB Video Card | $234.99 @ Amazon
Case | Corsair 200R ATX Mid Tower Case | $59.99 @ Micro Center
Power Supply | Rosewill 600W 80+ Gold Certified Semi-Modular ATX Power Supply | $79.98 @ Amazon
Operating System | Microsoft Windows 8.1 OEM (64-bit) | $89.99 @ NCIX US
| Prices include shipping, taxes, rebates, and discounts |
| Total | $900.24
| Generated by PCPartPicker 2015-07-09 00:56 EDT-0400 |

of the parts I have right now anything is up in the air but I would like the GPU to have four GB and I would also like to have a gold rated power supply. The biggest things I think I need help on or the motherboard and storage. I'm open to anything right now because you guys have way more experienced than me and the biggest thing I would like to stress and this is him first-time PC builder so would like everything to work right away and be reliable.

in the future I have some upgrades in mind first I would like to upgrade the RAM to at least 16 gigs but for the right now second would be to have a bigger hard drive third would be to put a blue Ray player in it and would eventually be to put a Intel Xeon E3-1231 V3 3.4GHz Quad-Core Processor

Basically made your build smaller but more acquainted to your needs.

CPU: Intel Xeon E3-1231 V3 3.4GHz Quad-Core Processor ($242.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper TX3 54.8 CFM Sleeve Bearing CPU Cooler ($19.98 @ OutletPC)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($45.89 @ OutletPC)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($42.99 @ Newegg)
Storage: Samsung 850 EVO-Series 120GB 2.5" Solid State Drive ($65.25 @ OutletPC)
Storage: Hitachi Deskstar 7K2000 2TB 3.5" 7200RPM Internal Hard Drive ($57.00 @ Amazon)
Video Card: Gigabyte Radeon R9 290 4GB WINDFORCE Video Card ($282.98 @ Newegg)
Case: Cooler Master N200 MicroATX Mid Tower Case ($39.99 @ NCIX US)
Power Supply: EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($81.24 @ Amazon)
Total: $878.31
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 03:28 EDT-0400

The Xeon is fine for what you are doing even for gaming cause I own one myself. You don't want a Z series motherboard for a locked cpu which is basically throwing money away. I have managed to get yourself a decent gpu that has 4gbs of ram and you can grab an OS dirt cheap online....... ( I am not responsible of what anything happens if you go that route.).

Heres what I would say

-Buy a cheaper motherboard. (your not going to overclock either a xeon or an i5 4460).

-Buy a cheaper power supply. (you don't want to skimp, but $80 seems overkill.

-Buy your copy of windows resold on reddit for like $15

-Either use the extra money to get a xeon, or just get an 8350. (i5 will outperform it, but paired with a 960 the 8350 is fine).

how do you buy one on Reddit i never use Reddit.i need the power supply to be gold certified. thank you for the help :)

The GPU need to be from Nvidia because it works better with it cuda cores works better with adobe aft effects Adobe premiere and that is the editing software i will be using. is the micro atx hard to work with i have big hands and i think a atx board would be better than a micro atx board

Premiere and AfterEffects work quite well with OpenCL and the AMD cards.

In either case, you won't really see a major boost in performance with 4k video using either CUDA or OpenCL until you have a really BEEFY card. Like a Quadro or FirePro.

As for 1080p video, I cut my render times in half with an AMD 280x

that is nice to now thank you