Ok, so since you do a lot of video editing, I would make numerous changes:
1) I would go for an Intel platform rather than an AMD platform since Intel CPUs are dominant when it comes to video editing.
2) If you arent going to overclock the CPU much, I would tone down the cooler to something like a Hyper 212 Evo.
3) I would tone down the RAM to about 1600MHz since 2133MHz doesnt make much of a difference when video editing (or even gaming).
4) I would replace the Digital Black2 HDD/SSD combo with a pure SSD.
5) I would replace the AMD GPU with something more hefty and nVidia based. I say this because nVidia drivers are usually more consistent and nVidia GPUs are generally better for video editing. BUT, if you are working with programs such as Adobe CC, then I would stick with an AMD GPU (more powerful than a 250X) since Adobe products make use of OpenGL for the most part and AMD is dominant at that.
6) Case is your choice. I personally recommend Corsair cases.
7) The PSU can be toned down to a 750W (Corsair HX 750) possibly, but I wouldnt go any lower since you are hoping to add more HDDs.
8) I would find a Bluray reader and writer all in one rather than having 2.
9) There is really no advantage to having Windows 7 Ultimate over Professional or even Home Premium. Ultimate just really allows you to install language packs (there are some other features that arent really important).
10) You dont need a Wifi adapter as long as the motherboard supports Wifi, but it matters on the board. We can determine that once we figure out the specifics.
11) Keyboard looks fine. I personally recommend the Logitech Wireless Solar Keyboard K750 ($60) since you never have to replace the batteries and the keys are more tactile. But it is your choice.
12) That mouse is made for laptops, just so you are aware
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Sorry for the long rant, but I want to get you the best rig possible
. I just need you to answer some questions first though, what programs do you use? How hardcore of a video editor are you (professional?)? Are the projects you work with in very high resolutions such as 4K? What is your price range for this machine? <--- this will help determine which CPU and GPU you can purchase (along with other parts).
I hope this helps.
-JC