Built this PC for my sister for her birthday. After 4-5 years of gaming on a MacBook pro, she's finally joining the PC Master Race. Her budget was less than $900, and I understand I could have done better part wise and/or price wise, but she is more than satisfied with everything listed here.
First off, I just wanted to note that when gathering parts, pcpartpicker noted that they did not know if the CPU cooler and the case would work; they do perfectly as you'll see in the pictures. I also wanted to note that depending on the GPU selected, you cannot have a fan on the bottom slot of the side panel because the GPU power cable interferes with the blades of the fan. Other than those two notes, everything here fit together beautifully!
The temps listed in the details are using custom fan curves; GPU using EVGA Precision X OC Aggressive preset, CPU fan using custom one in the UEFI/BIOS (which is in the pictures, and yes the fan is still very quiet!) The load temps were taken using CPUID for the CPU temp and for the GPU I just ran Warframe all settings maxed, no motion blur, and no fps lock; lock the fps to 60 and the temps lower significantly. (Warframe was used because it's a free to play that I downloaded real quick and because the system will be used by my sister, so there's nothing to run as of this post. On my personal rig, Warframe does the same temps with a GTX 1080)
I did actually add a Crucial MX300 525GB SSD but I did not add to the price here because it was an extra SSD I had on hand. If interested, the Rosewill fans listed here were in a 2-pack and one of them is in the top slot of the side panel feeding fresh air to the CPU cooler and the other fan is the intake on the front.
PS. I did have to update the UEFI/BIOS in order to use the Kaby Lake CPU and Mouse and Keyboard were extras I had as well.