Need some advice for gaming rig

base build...

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($229.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Amazon)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($127.99 @ Amazon)
Memory: G.Skill Sniper Gaming Series 16GB (2 x 8GB) DDR3-1600 Memory ($69.98 @ Outlet PC)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($89.99 @ Amazon)
Storage: Samsung 840 Series 250GB 2.5" Solid State Disk ($164.99 @ Adorama)
Video Card: Gigabyte GeForce GTX 670 4GB Video Card ($426.97 @ Newegg)
Case: Antec Three Hundred Two ATX Mid Tower Case ($69.99 @ Newegg)
Power Supply: SeaSonic X Series 850W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($139.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $1439.85
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-04 02:35 EST-0500)

leaves room for anything else

You could go with this.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($229.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Amazon)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($127.99 @ Amazon)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1600 Memory ($78.98 @ Outlet PC)
Storage: Crucial M4 256GB 2.5" Solid State Disk ($184.95 @ B&H)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.99 @ NCIX US)
Video Card: Gigabyte Radeon HD 7970 3GB Video Card ($399.99 @ Amazon)
Case: NZXT Phantom 410 (White) ATX Mid Tower Case ($98.98 @ Outlet PC)
Power Supply: PC Power & Cooling Silencer Mk II 950W 80 PLUS Silver Certified ATX12V / EPS12V Power Supply ($119.22 @ Amazon)
Optical Drive: Samsung SH-224BB DVD/CD Writer ($15.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $1446.04
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-04 03:13 EST-0500)