I recently just got that mobo. Its damn good and I was skeptical about the 2 oz copper but it really does make a difference. It also overclocks very well and do so with ease.
Your build is nice but I would suggest getting another harddrive if you can afford to do so. Also are you sure that case is going to fit your GPU?
I'm pretty sure the P183 can fit it...it's quite a pricey case that's supposed to have lots of room to work with, removable HD cage might get in the way is what I've heard.
I think I'm just gonna use the samsung HD til SSD becomes more affordable and switch that out as an upgrade.
Now I gotta wait