Looking to Build a New Gaming Rig - Need Advice

That PSU is not enough. You need 500w or more from Antec, XFX, Corsair, Seasonic.
Get a WAY cheaper motherboard.
Get a regular HDD, not a server HDD.

Forget the sabertooth.. the thermal armor is more of a gimmick.. for $1,500 you should get this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-3570K 3.4GHz Quad-Core Processor ($189.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ Outlet PC)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($134.99 @ Amazon)
Memory: Corsair XMS3 8GB (2 x 4GB) DDR3-1600 Memory ($56.93 @ NCIX US)
Storage: Crucial M4 128GB 2.5" Solid State Disk ($115.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.98 @ Outlet PC)
Video Card: Gigabyte GeForce GTX 670 2GB Video Card ($369.99 @ Newegg)
Case: Cooler Master Storm Enforcer ATX Mid Tower Case ($79.98 @ Amazon)
Power Supply: XFX 750W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($89.99 @ NCIX US)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.98 @ Outlet PC)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Monitor: Asus VS239H-P 23.0" Monitor ($171.98 @ Amazon)
Total: $1415.76
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-20 01:50 EDT-0400)

And this extra fans for the case for best cooling:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Case Fan: Corsair Air Series AF120 Performance Edition 63.5 CFM 120mm Fan ($14.99 @ Amazon)
Case Fan: Corsair Air Series SP120 Quiet Edition 37.9 CFM 120mm Fan ($14.99 @ Amazon)
Total: $29.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-03-20 01:56 EDT-0400)