CPU: Why are you building a $3,500 PC when you only have an i7-6700K, you want to play Cities: Skylines, a game which relies so much on CPU.
Memory: Only 16GB?
Storage: Overkill on the SSD, you don't need two, 2 TB is not worth it.
PSU: Thank you for not going too overkill on the PSU.
OS: You can get a cheaper version elsewhere.
WNA: Running a build like this over Wi-Fi makes me sad.
Monitor: TVs are awful to use, the response time is too bad.
Headphone: If you've got this much money to burn I'd recommend getting better headphones.