Mike.... ignore the jealous individual above. Awesome PC!!!
😄Re fan controllers, shouldn't be required. Asus boards come with plenty of Fan headers. However, if you decide you need more capability in that respect, Phanteks make a nice PWM fan module. You plug it into one motherboard PWM header and you can then run 11 PWM fans total. As I say, don't think you will need it though.
Asus boards also come with AiSuite and Fan Xpert 3. Fan Xpert controls fans nicely. You can make your own fan curve or choose one of the presets.
The other option is the infamously illusive Asus Fan Extension Module. Nice little board that pretty much does the same thing, plus it includes thermal sensors. Trouble is, it was announced as an accessory when Z170 was released, but has remained illusive even since. God knows what Asus are playing at.
http://www.phanteks.com/PH-PWHUB.htmlYou don't say which enclosure you are buying? I own a Lian Li X510, VERY expensive but an awesome enclosure that would be great for your build. Screws won't usually be needed, your PC enclosure will come with all necessary fixing. You will need cable ties though. Velcro cable ties and/or Zip Ties will do the trick.