(Update April 2018, I changed the CPU cooler and overclocked).

I built this system to be placed in our living room under two conditions set by my wife: It had to be small and it had to be white, all of it. So I came up with this:

Core I5-8600K I was very close to get the i5 8400, but I changed my order in the last minute and got the 8600K so that I could do some overclocking, just for fun as I really don't need it. I had some problems with overclocking it initially. The cooler I got first wasn't powerful enough (BQ Pure Rock Slim) and the Z370N's VRM gets really hot, even a small overclock was bringing it over 100C. So I moved the BQ cooler to my wife's PC and got the Noctua C14S instead, which fits in the case by a hair. The Noctua is a much more powerful cooler and the top-down setup helps cooling the VRM as well. I overclocked to stable 4800 Mhz with CPU core temps peaking at 75C at load and VRM at 83C, which is fine for me.

be quiet! Pure Rock Slim then replaced with Noctua NH-C14S The BQ Pure Rock Slim is a good cooler for a locked CPU, but not good enough for the 8600K. The Noctua on the other hand is probably the best air cooler you can fit in this case. It comes just with one fan which I put on top, for the bottom I used a Phanteks 140mm I had already purchased. The two fan setup is not really needed for cooling the CPU, but it helps cooling the VRM better.

Temperatures went down by 5C when I put the side panel on top and the window on the side against the wall. Now the cooler can take the air directly from outside the case, maybe I should get dust filters.

The C14S is almost as big as the motherboard, making it difficult to plug the case's USB cable. I solved this problem with a low profile adapter I found in ebay. It was delivered from Hong Kong in less than 10 days.

Gigabyte Z370N WIFI The Z370N packs a lot of features in 17cm x 17cm: It comes with two 4-PIN case fan headers, which is all I needed. Two m.2 slots which I didn't use yet, 4 SATA slots which is plenty enough for my needs, sound is good and the WIFI part works well. I also like gigabyte's smart fan software. However I found out the VRM gets too hot, which makes this mobo less than ideal for overclocking.

Corsair Vengeance LPX I got the LPX because they are low profile, so they don't interfere with CPU cooler.

Samsung EVO 850 500GB and ASUS STRIX GTX 970 I recycled from my previous PC. The GPU needs replacement badly, but with the current GPU market situation I'll just wait a few moths and see what happens. I'd love to get a VEGA 56 to pair with the freesync monitor, but current prices are crazy. Thermaltake core V1 I love this case and it's small and white so it pleases both me and my wife. I love the looks and how you can put so many components in it and it doesn't fill cramped.

SeaSonic FOCUS Plus Gold 650W Cheaper than EVGA and checks all the boxes. Getting all the cables plugged to the Mobo was a pain due the small size of the case.

Noctua NF-A20 Initially I got the Phanteks 140mm, but after a week I wasn't happy with the airflow in the case, so I ordered the Noctua and I feel it's better now. It comes with some rubber screws, but they wouldn't fit through the holes in the case and I ended up using the metal screws that came with the stock fan. I ended up using the Phanteks fan with the CPU cooler.

Iiyama monitor Not the monitor I wanted, but it's white, IPS and 1440p. It comes with freesync, which I might never use. The monitor is OK for the price, but many will find it too bright.

Logitech G700 I've been using it for the last 6 years and it never failed me. It's the only black thing it in the build but I don't intend to replace it.

Steelseries Arctis 3 I like it and it's white so my wife also likes it. I got in Germany for a decent price.

Drevo Excalibur It's white, it's small and it's mechanical with brown switches. I couldn't find a single keyboard with these characteristics in Switzerland so I had to go to Germany and get it. It has American layout so I'll have to get used to that.