Second Gaming build ~1500

Hey guys what are your thoughts on this build? This is my first SLI build, are there anythings you would change? I also don't know a whole lot about Galaxy cards, but all the reviews were good.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($169.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.71 @ Amazon)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($134.99 @ Newegg)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($38.98 @ Outlet PC)
Storage: Crucial M4 128GB 2.5" Solid State Disk ($99.99 @ B&H)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: Galaxy GeForce GTX 670 2GB Video Card (2-Way SLI) ($319.99 @ NCIX US)
Video Card: Galaxy GeForce GTX 670 2GB Video Card (2-Way SLI) ($319.99 @ NCIX US)
Case: Corsair Carbide Series 300R Windowed ATX Mid Tower Case ($79.99 @ Newegg)
Power Supply: SeaSonic X Series 850W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($139.99 @ Newegg)
Optical Drive: Lite-On IHAS324-98 DVD/CD Writer ($14.99 @ Newegg)
Total: $1418.60
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-06 13:37 EST-0500)