You don't have a copy of windows already laying around, do you?
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i3-4170 3.7GHz Dual-Core Processor | $114.89 @ OutletPC |
| CPU Cooler | Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler | $29.44 @ Amazon |
| Motherboard | ASRock H97M PRO4 Micro ATX LGA1150 Motherboard | $74.99 @ SuperBiiz |
| Memory | Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory | $37.94 @ Amazon |
| Storage | Samsung 850 EVO-Series 250GB 2.5" Solid State Drive | $87.49 @ OutletPC |
| Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | $49.89 @ OutletPC |
| Video Card | EVGA GeForce GTX 950 2GB Superclocked+ ACX 2.0 Video Card | $155.99 @ SuperBiiz |
| Case | Corsair 200R ATX Mid Tower Case | $59.99 @ Amazon |
| Power Supply | EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply | $69.99 @ Amazon |
| Wireless Network Adapter | Asus PCE-N10 802.11b/g/n PCI-Express x1 Wi-Fi Adapter | $17.99 @ Micro Center |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $698.60 | |
| Generated by PCPartPicker 2016-02-20 11:28 EST-0500 |
Because if not we'd exceed the budget a little. I personally have no experience with wireless cards, went with one that's popular.
Got you a 250GB SSD for the OS and important stuff and a 950 instead of a 750Ti, it will definitely meet your gaming expectations.