Yes, I will be getting a 4K also - bit peeved they announced when I was already into the build - but hey ho. I may have a look at the 4K innerds when I have owned for a bit.
Took me on and off about 6 months to build - but that was purely as I was making it up as I went along, and had no idea what would fit. I guess you could knock one out much quicker now as one has been done
I may offer this up once my sanity returns haha! It has 8 fans keeping the airflow through the enclosure, and also a custom CPU cooler I made and wired inside, as old one was redundent. One large 12cm intake on bottom, 3x 35mm on exhaust vents top back (was going to do all 6 but thought that would be to much). The 4x 25mm fans at front as PSU is there and gets stagnant warm air if not shifted
I dread to think of costs....