This is my third PC build, and by far the most powerful computer I have ever built. All parts were purchased used, so the total came to around $1100 including the monitor (I happen to be very cheap and good at finding deals).
The intended uses for this PC are gaming and rendering, although I may use it for photo editing once my laptop is no longer sufficient, hence the 5820K and X99 chipset. The five Noctua NF-F12's keep the system running nice and quiet (temps to be posted once I overclock), and the GTX 970 has been more than sufficient for the games I play, even at 1440p. My only concern is that the power supply is overkill, but I found it at a third of its listed price and it should give good headroom for overclocking and expansion (see below).
Although this build should be more than sufficient for now, I eventually plan on upgrading to a CaseLabs BH7, adding a second GPU and more storage, and possibly trying custom water-cooling or the EK Predator 240, depending on the case's clearance. I'm also looking into a Vortex Pok3r keyboard and ROG Swift monitor.
Please feel free to leave any comments/suggestions/criticism below, and thanks for reading!