So, you are not aware that windows 7 upgrades to 10 pro for free? hence... 20$ windows 10pro?
You already have a GPU as well? well there you go, 63$ and another 50, as you said you can go to 550$, gets you the ssd as a boot drive, and a WD black 2+tb drive. Plus it comes with a HSF that will do the job just fine, and the system will consume less power, get things done faster (most likely), and be upgradeable for the current, and next gen. Or you can buy 2012 vintage equipment.
Your call I guess, but again, if you go AMD at this point in time, its because of fierce brand loyalty, not dollars and sense.
http://pcpartpicker.com/list/PkWFf8
That includes a storage drive, and a monitor, and I might even have a windows 7 pro key laying around, or 20$ on the forums.
You can go to an ADATA drive for another 6-8$ less, and choose a cheaper monitor as well.
http://pcpartpicker.com/list/H7sD4C
There ya go.
Under budget, 20$ windows 7 pro which is FREE TO WINDOWS 10PRO, 546$. Better investment now, better investment longer term. Also that last link includes an IPS monitor as well.
Gold powersupply is great, but un-needed. the Intel system will consume roughly 1/2 the wattage of the AMD system, if not more. The eVGA 500B is a highly reviewed and highly praised PSU. But you could use the under-budget savings to hop up to a more expensive one if you feel like it.