Intel Core™ i5-4670K Processor
Gigabyte GA-Z87X-D3H Motherboard
G.SKILL RipjawsX Series 8GB PC3-12800 Dual Channel DDR3 Kit (2 x 4GB)
AsusGTX760 Direct CU II OC GeForce GTX 760 2GB
Corsair CX Series CX500M Modular Power Supply
Total comes to about $800 assuming that you have a case and hard drive already. If you don't have a case, pick up a cheap one that you like for around $50.