That RAM's way too high-end. There isn't much of a performance benefit above 1600mhz, so just save your money.
The case should be decided entirely by stylistic preference. If you like this one best, good, but if you're choosing it for "performance," keep looking.
Skip that PSU. A good 650W unit will be fine for two 670s, and I don't really trust Thermaltake as a PSU brand. OCZ's are good.
You might as well get an ASRock Z77 Extreme4 and save some cash.
You don't need an HDMI cable. The monitor will come with a DVI cable, which carries the same video signal as HDMI.
With all your extra money from the above, you may want to go for a 256gb SSD. Check out the Crucial M4. My 120gb Corsair is fine for most things, but I can't fit many games on it. Steam, for instance, keeps all of its games in a single folder, and I have to keep it on my hard drive for lack of SSD space.