This was a build that my uncle asked me to do for him to replace his rig we built back in 2010. This rig is absolutely way over the top for him, heck a G3258 with 8GB RAM would suffice for him. He gave me a large budget and said build what you want. I had a lot of headaches building this, had to RMA one of the 980s, the Megahalems (yes I used it again, I absolutely love this cooler) came missing a set of fan clips, the SLI bridge didn't fit from Nvidia (which didn't match anyways) and the EVGA was impossible to find...I ended up using mine from Project-ARK. The grey sleeving wouldn't fit and I had to make wires out of scratch since I snipped some cables a little too short, and my 6 pin connectors from Corsair came all smashed up.
All in all, I still enjoyed building something with this much power. We were going to do a watercooled X99 build but DDR4 is way too expensive and I think he would benefit more from the nice single threaded performance of the 4790K due to it's stock 4GHz clock.