It does rock!
Everything but the PSU arrived yesterday. I won't get it until Tuesday so I'm using my old one for the time being, with sleep and hibernate disabled.
Overall the build was very painless. Everything worked first time. Only thing I did forget to plug in was the USB cable from the water block, but that was just for monitoring and playing with the LED colours.
It's great having a case with decent cable management and side loading drives at last. It's something I've long wanted but kept putting off doing, basically out of laziness. Having experienced the new goodness I'll be replacing the case for my old build for sure. Very happy with the NZXT 530 for the price, so will probably get another for that. I love the LEDs on the back panel for when you're plugging stuff in (they're on a switch).
I won't be pushing the overclocks too hard for a while, but I will be having a look at the tradeoffs between running my ram at full speed and having a better cpu overclock.
Currently very stable at 1.275v, 4425mhz cpu, 3034mhz ram. Idles at around 29C, peaks at 55C while under 100% load over all 6 cores when stress testing with the H.264 video encoding portion of the Asus RealBench software. That's using the default fan profile for the radiator fans. It can get extremely loud if I ramp up the fans any more than that. I may look into replacing the stock fans that came with it, but I've not noticed that kind of usage in games yet.
So far, I've tested just a couple of the more demanding games that my old rig + 980ti struggled with at high settings, namely Project Cars and GTA V. Was able to max out both games and they both were a joy. No hitching whatsoever. GTA did dip to the 50's occasionally during the benchmark, but without vsync it wasn't particularly noticable. Fairly sure I could easily get a solid >60 if I dialed in some of the more insane settings. I just wish I hadn't played the crap out of it already.
One thing I wasn't really expecting, and I think it's more due to the motherboard, was the blazing fast startup times. On my old rig, once past the POST stage and looking at the windows swirly dots, I'd be at my desktop in perhaps 20 seconds or so. Including the preamble from powering on it would be perhaps 50 seconds. Now I'm at my desktop in 15 seconds from hitting the power switch. It's not particularly important, but it is nice.
I haven't tested any games on the Rift DK2 yet. I did have some pretty major stuttering issues in Euro Truck Simulator 2015 in VR on my old setup, so looking forward to seeing if that's fixed.