Darkbreezes suggestion below is good, and I have a few suggestions to improve it:
1) Either get include a cheap CPU Cooler, like Coolermaster Hyper 212 EVO ($25) or get a cheaper non k-series chip. K series is meant for overclocking, and then you need a cooler. No OC, no K-series chip. No K-series chip, means options for cheaper motherboard.
With no OC. You could get Intel Core i5-4590 Quad-Core 3.3 GHz for $199 and save $17. Pair it with MSI Computer Corp. H81M-E34 for $57 and save another $20
2) Skip the optical drive, unless you know you´re gonna need it. Chances are that you already got a CD/DVD-drive already but didnt mention it. Shave another $14 off here.
New list with no overclocking:
CPU: Intel Core i5-4590 Quad-Core 3.3 GHz for $199
Motherboard: MSI Computer Corp. H81M-E34 for $57
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1600 Memory ($64.99 @ Newegg)
Video Card: EVGA GeForce GTX 960 4GB SuperSC ACX 2.0+ Video Card ($189.99 @ Newegg)
Power Supply: EVGA SuperNOVA NEX 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($49.99 @ Newegg)
Total Price : $561