Agreed, zerro reason to get itx board (which usually costs more vs atx conterpart) to go into case designed for full atx boards.
If you are buying it jsut for wifi dont.
I would advise tryinging powelrine adapter over wifi (assuming you cant just hard wire PC to router).
Why that cooler, it is massive, a complete PITA to install from reviews, and wont make much of a difference vs 212 evo or cyrog c7 at half the cost?
Other then that it looks good. 750w is right on the money for a 1080 while running a good overclock, the 650 would work but not leave much head room