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#21
As for the case, yes both motherboards would fit in that case. For the ram, if you are choosing G Skill ram (which I llike) if you will go to G Skill's site and look up that model of ram, it will have a QVL list which will tell you which boards it has been tested in. For example, the G Skill ram you chose for System 1 Ram. G Skill states it is made for the Intel X99 boards and there are no AMD boards listed for it ( http://www.gskill.com/en/product/f4-2666c15d-8grr ). The second rig with the Aegis G Skill ram also states it is built for Intel Systems but has no QVL list. It is also a single 8 GB stick. I would recommend buying either 2 8 GB sticks or 2 4 GB sticks if you want to stay with 8 GB. It makes it run in dual channel mode. You can also look up your motherboard on the manufacturer's web site and it will have a QVL list for ram, which will tell you the ram they tested it with.
I also don't see a CPU cooler listed. I have never used the stock CPU coolers from the CPU Manufacturer. They tend to be not very good, especially if you want to overclock or keep the CPU stressed for long periods. If you can afford it, I would recommend an SSD too. That will be a great improvement in performance for you. I have always maintained that an SSD is the single most noticeable upgrade you can do to a computer. An M.2 PCIe SSD is even better. I believe both boards have M.2 slots in them.
As for the graphics card, it is a decent performing GPU. My biggest concern is some of the newer games coming out will use more than the 3 GB of Vram the card has. If you are a gamer, I would buy the best graphics card I can afford. The power supplies you picked are sufficient for the rig you are building, but they will stop you if you ever decide to buy a better graphics card. I would consider a bigger PSU so that the PSU does not run at near it's max and lasts longer and provides ample upgrade room. Failing that, if you were to want a better GPU in the future, you would have to buy a new PSU to run it. Most PSUs run more efficiently at 65-70% of their max.
Those are just some of my thoughts on your parts list.