Everything will work together.
You will need 600-700W to power that.
Here is a nice PSU that will power everything you have already listed and will still have a lot of power left:
The Antec 900 is a very small case, but everything should fit nicely.
If I were you, I'd wait a bit for a drop in prices on the i7 quads and would go for a quad-core build, but if you so desire, the build you listed will work.