There is no point at all getting the 8GB version of GPU unless you are planning on running multiple VERY high resolution monitors. 3-4 GB is more then ample for 1080p.
You dont need 16GB of memory unless you have a specific function for it, i.e CAD work, Video editing, rendering e.t.c. 8GB will be more then enough.
The motherboard is the one I use and it is showing its age now. It was old when I got it over a year ago. Go for the later ASROCK board with a 990x chipset or an equivalent.
Go for a Samsung Evo SSD, much better track record then the Toshiba.