-You could get the Gigabyte version of the GTX 670 and save 20$. The ASUS and Gigabyte versions are the best 670 models.
-You said you probably won't be doing any hardcore OCs. I don't understand why Noctua D14 and water cooling is even mentioned. The Hyper 212 will manage 4,2GHz without any problems at all, and it's very quiet.
-Are you sure you need a 256GB SSD? There is no need to install games on a SSD imo.
-The board you picked is expensive. Go for something like this Extreme4. Excellent board for the price.