Basically copied mekberg's Fame Monster build (https://pcpartpicker.com/b/QRw6Mp) 1:1 with some minor changes.
There isn't much else to say other than he really wasn't joking about the tolerances in the NZXT case with regard to getting those fan clips and Chromax heatsink covers on. The first time I installed the fans and covers it took me almost two hours of fidgeting to get the right technique down. The second time (had to re-paste my CPU due to what I thought was a heat issue) I got them on in 5 minutes.
In case anyone is interested, the best way I found to get them on was with the case standing up, not laying back on its side. First hold the fan with the clips attached up against the heat sink and position it where you want. Don't forget to set it back far enough to leave room for your case panel to close! Once you've got the fan where you want it put the bottom clips on to help keep the fan in place.
Now flip the top clip up on to the heat sink but leave it loose. Take a long screwdriver and thread it between the top of the case and the top of the heat sink, and up under the clip. You want to screwdriver to be long enough to extend all the way through and under both the front and back of the clip. Pull up with the screwdriver so that the clip hooks onto it, and move the screwdriver as far up and away from the fan as you can, pulling the clip as tight as possible. Make sure to keep the screwdriver parallel with the floor so the clip doesn't slide off. Once you've got the clip pulled as far away from the fan as possible you can bring the screwdriver down towards the heat sink, at which point the clip will eventually pop off and snap back towards the fan. If you did it right the clip will catch on the top of the heat sink as it snaps back, clipping itself in place. You might need to tap it down a little with the screwdriver to make sure it's secure.
For the heatsink covers you basically have to brute-force it, which sounds terrifying, but the tower cooler and mobo have a little bit of give. I used the same long screwdriver as a lever between the top of the heat sink and the case to widen the gap, then slid the cover on the top first as far as it would go. Then I tapped the front once with my palm to pop it all the way on, at which point the bottom part is easy.
Good luck :P