Your build would be severely bottlenecked by the HDD speed, green drives, except for large backup. are a definite No No.
16GB RAM is not enough, will limit performance.
Case, I believe, inferior to the Antec which has a separate PSU bay, HAF has less hard drive cooling, not very controllable fans.
PSU. very good but, the Antec 850w CF is more than enough for your build and is cheaper.
My suggestions, upped the Mobo, exactly same features, but adds WiFi and Blu_tooth.
+ Card reader add to total..
Am looking to see if you would get better performance from a GTX 570 with 2.5GB memory.