@ Z - I am so happy for you, what a build! I think many of us will follow suit in 2012 on some good ones...so stoked about the 560Tix2 GPU! Please keep me updated on the performance of that because you have both 580 and 590 to compare.
Couple last thoughts - do you really need an SSD that big? And also do you really like the MSI mobo or is there a Gigabyte or ASUS/ASRock one that you would consider?