If you've had windows before you don't have to buy it again, if you hadn't, -snip-
You'll save a hunder bucks and get a much better GPU

if you can go $30 over $700

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.89 @ OutletPC)
Motherboard: ASRock H81M Micro ATX LGA1150 Motherboard ($59.99 @ SuperBiiz)
Memory: Mushkin ECO2 8GB (2 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($45.89 @ OutletPC)
Video Card: MSI Radeon R9 390 8GB Video Card ($313.98 @ Newegg)
Case: Thermaltake Versa H25 ATX Mid Tower Case ($37.99 @ SuperBiiz)
Power Supply: Cooler Master VSM 650W 80+ Gold Certified Semi-Modular ATX Power Supply ($59.99 @ Newegg)
Total: $732.72
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-20 13:26 EDT-0400
(that psu will save you some electricity )

if you can't

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.89 @ OutletPC)
Motherboard: ASRock H81M Micro ATX LGA1150 Motherboard ($59.99 @ SuperBiiz)
Memory: Mushkin ECO2 8GB (2 x 4GB) DDR3-1600 Memory ($39.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($45.89 @ OutletPC)
Video Card: EVGA GeForce GTX 960 2GB SuperSC ACX 2.0+ Video Card ($175.99 @ NCIX US)
Case: Thermaltake Versa H25 ATX Mid Tower Case ($37.99 @ SuperBiiz)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($55.99 @ SuperBiiz)
Total: $590.73
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-10-20 13:29 EDT-0400

(I kept some of your parts)

If you really wanna buy windows and stay at that budget change cpu to fx 6300, get an amd supported motherboard and a gtx 960

This looks like a pretty stable build for what its designed for. You might want to look into an amd CPU, they are a lot cheaper and should offer relatively similar performance in these task. As for future compatibility you might want to be careful with the 2gb (2gb if plenty for minecraft, TF2, CS and other similar games, but might not be enough for games like TR, Crysis, FC3+4, GTAV, SoM) of VRAM on the gtx 950, several games today require more than that on high texture settings, so maybe getting something with 3gb would be better and then you could always add another in SLI in the future. Also please for the love of god pick up a cheap SSD for a boot drive, even just an 80gb or 128gb SSD for the OS and a few main programs will make a huge speed improvement when booting/loading programs on the SSD.

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