The Corsair CX 430 is a more reliable PSU and is 5 dollars cheaper with a mail in rebate.
You can get a Seagate drive 500GB SATA 6.0 GB/s for $15 less at NCIX US, including shipping.
If you're only using 1333 MHz RAM, you might as well go Sandy Bridge. 1333 MHz is the standard for Sandy Bridge, and there isn't a SIGNIFICANT perfomance difference. It'll be slight, hardly noticeable. Take lchrisk's advice, and drop down to a G630. They probably won't notice a difference, lol.