That reminds me, GTX 1050 just came out. Could be a way to spend some money otherwise, since your build is not primarly for gaming.
Ouch... so you basically just know what your PC may cost, but not what to use it for? Then I suggest to cut down on that CPU, MB, SSD and RAM, buy a GTX 1080 or dual GTX 970 and place your PC at disposal for distributed computing projects. They need maximum FLOPs, so GPU is better than CPU Some Projects even enable you to see what your resources are exactly used for. Quite interesting in fact
It's lending. Except you get to keep and use your PC OK you actually donate energy. True. Or make a $ 800,- PC instead and buy a stockpile of socks.
You could probably get a GTX 1080, an i7, and a decent 500gb SSD if you already have a motherboard, some ram, a power supply, and an HDD. All that stuff is cheap though if you don't already have it, and you might be able to get it with the remaining $150.