1st time gaming build, probably around $800-900 range.

[Vladislav Andreev]

PCPartPicker part list / Price breakdown by merchant / Benchmarks

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($219.99 @ Newegg)
Motherboard: ASRock Z87 Pro3 ATX LGA1150 Motherboard ($94.99 @ Newegg)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($82.21 @ NCIX US)
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($132.99 @ Mac Mall)
Video Card: Asus Radeon R9 270X 2GB Video Card ($215.91 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($69.99 @ Newegg)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($64.00 @ Amazon)
Operating System: Microsoft Windows 8 (OEM) (64-bit) (Purchased For $0.00)
Total: $870.08
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-26 22:06 EST-0500)

I have updated the build once again with a case that I like and a recommendation for a PSU.

 

[animal]

you might want to consider replacing the PSU you chose, the CX series is their low-end series, here is a combo for a case and PSU on pcpartpicker:

http://pcpartpicker.com/p/hpp2