My current everyday build. Spent a lot of money on it, learning a lot in process.
Went through using Rampage V Extreme (non Version 10) MB, then NZXT Kraken x61 (pump failed, switched to beefiest air cooler I could find) and finally Intel SRT (acceleration drive failed in the end, did not use the stuff again).
Two 200mm fans on top, one 200mm fan in the front, one slim 200mm fan on the side panel and a 140mm in the back. Tested some fans in the process settling for ones with the lowest noise I could find.
Why double graphics cards? At the time I thought it would be nice to have a separate card for the secondary display (was sick and tired of Win7 giving me its famous "out of resources" warning message,) and also offload PhysX processing to it. And yeah, offloading PhysX to a separate card is a thing and it does improve your synthetic test results, but I haven't played that many PhysX games since, if at all. Poor, poor, pitiful me.
Enjoys a small overclock - 4GHz turbo@all cores. It could go higher but I stopped seeing reasons to go higher long ago.
This system also enjoys the dubious honor of being the reason I was scammed out of approx. RUR30000 (~USD461) for a replacement top Broadwell-E processor. No idea if I should actually switch for more cores and new techprocess and slightly higher clocks.
Features a very small mod - additional programmable LED lighting on the front with a separate controller (why that? because in initial motherboars's time RGB headers were not yet a thing and I wanted to dust off my soldering&making skills anyway). The rest came with the case (with an integrated RGB controller), I went with a "black with green visor" theme to give the case a slight mecha look. After all, that was the original intention, resulting in me importing this particular case and paying a premium for it