I'd go for the Plextor M5S for the SSD, it performs just the same as the Samsung 840 but it has MLC NAND.
The Samsung memory is out of stock... switched for G.Skill Sniper's.
Also the WD Blue WD10EZEX is actually a better performer than the Black (althrough being a Blue), it's the newest and only single-platter 1TB drive from Western Digital (more info here
Go with a 7950 instead of the 7970. It's 3-5% slower on stock clocks but it's significantly cheaper. In fact the 7970 has worse value because it's the flagship card. The Gigabyte is the cheapest great card so I'd go with that.
The 650W Capstone PSU is cheaper than the 550W right now so I'd go for that.
Also, for the mouse and keyboard first I'd take the Logitech G400 which is a great mouse and cheaper than the Razer, and also I'd go with a mechanical keyboard like the CM Storm QuickFire which are much better than regular's (MX Brown switches are my pick!).
Lastly, for the case you could go with the Corsair 400R or NZXT Phantom 410. The Corsair has top-notch build quality.
Here's the corresponding partlist: http://pcpartpicker.com/p/E6rYTotal: