Total comes to $776.85 after promo codes and shipping ($726.85 after MIR). Its a little higher than my stated budget, but it has shipping included, and a better Video Card than I was looking at so its alright.
Well you're going to have to hack drivers to be able to successfully SLI GTX 470s on an AMD chipset motherboard. To SLI you will need a Nvidia chipset motherboard, which last time I checked don't have SATA6G/USB3. Alternatively you could get an ATI video card. A 5850 will be plenty powerful enough at 1680x1050.
The PSU has been well reviewed at hardwaresecrets, the relatively poor/short warranty might put some people off. It is enough for one GTX 470, but would not be advisable for two.
You should get that case in combo with the 955, as the 965 is a factory OCed 955, it is the simplest OC in the world to get 965 performance out of a 955. Even if you don't do that the typical price difference doesnt justify the clock difference - in this case you would save yourself ~$15.