Galanoth

A few things I haven't seen posted, the difference between DDR3 and DDR4 in gaming is not noticeable. A GTX 1080 with a 4770 and 16 GB should play most current generation games easily. That being said I wouldn't recommend a GTX 1080 for 1080p, I think a GTX 1070 is a much more sensible option, however if you plan to play games at 1440p running at 144Hz then a GTX 1080 is a more feasible solution.

Because you put medium gaming it looks like you should stick with the i3 and 750ti. Fortunately if this is for college purposes, many colleges have servers you can compile code on allowing you to leverage their servers which are likely much more powerful than a system that is within your budget.

Is there any reason you chose an A8? I have seen quite a few A10's perform decently for low cost gaming. If you have a budget I could probably help more, but one other thing I would recommend is using a PCI wireless network adapter, I use a TP-LINK TL-WN851ND, it is still ~$20 so I think it is a better option to USB equivalents. If you can get a dedicated CPU and dedicated GPU try to do so.

Just to give you an idea of recent SSD vs HDD performance and reliability. Currently SSD's have a higher mean time to failure, which is just the time it takes on average for a drive to fail, higher is much better here as it takes longer for it to fail in some sort of way. Comparatively for cost, yes SSD's do have a higher cost per GB than HDD, but right now SSD's for boot drives are relatively inexpensive ($60 can get you a solid boot drive). One thing that gets brought up as a "problem" of SSD's is their write speeds not being significantly faster than HDD's. For some users it is pretty important to have fast write speeds but for the vast majority of normal people, read speeds are what you want as that will reduce times for: loading games, booting your OS, launching programs, etc. Hopefully that helps give you an idea of why everyone here keeps saying put an SSD in your system, it really does make a difference.