Built this recently for a friend's first gaming PC. He's pretty happy with it. Went with Kaby Lake over Ryzen just because I don't want to deal with too much tech support (heard about issues with memory and Ryzen boards, even if the RAM is on the QVL for the motherboard).
CPU @ 4.5ghz, didn't want to push too hard here for the same reason above. Running about 30-40 idle, 70's while gaming (little spikes here and there in the 80's). 1.25 core voltage.
GPU not overclocked but seems to be boosting into 1800's while gaming. 80-100 FPS in Witcher 3 (1440p, all ultra settings, hairworks on/max AA). ~110 fps in Gears of War, all ultra settings. Temps in the mid 70's without touching the fan curve or overclocking.
Didn't get to test much else before he took it home. Same reason why there aren't many pics. And that's just a temporary set up on the kitchen table.
Great value. Easily overclocked the i5-7600k to 4.5ghz @ 1.25 voltage. Haven't tried to push more, but I wouldn't expect it to be an issue. Recognized the DDR4-3000mhz RAM's XMP profile immediately. The light on the board that tells you if there's a problem when you boot up actually helped us detect a faulty monitor (VGA light lit up when first booting).
Best price for a 16GB kit @ 3000mhz at this time. Worked at the stated speed out of the box with the MSI Z270A Pro ATX motherboard.
Don't think you can beat this for the price. Fans included are quiet. Lots of space, but not the best if you want really clean cable management.
Another good value. No complaints.
Best price for a non-blower style 1080 ti at the time of writing (9/14/17) and it's EVGA brand. Runs fairly quietly, 1800+ boost clocks out of the box, nice lighting in a windowed case. Runs in the mid 70's with the default fan curve.