Just for a frame of reference, I also have 16GB of RAM, and I typically have ~40 tabs open in Google Chrome, I know it's crazy, sue me. :P But that typically takes only a few GB of RAM at the most, so the RAM might be a bit overkill but it should surely provide you breathing room when it comes time to film and render.
You say you play WoW on a tv screen? How many inches/what is the resolution?
In regards to the GPU, know that if you ever choose to SLI with another 570, you will have very little room to expand after that, as with the DCII 570s being triple-slotters, they take up a huge amount of PCI lanes. So just be warned in that regard.
Everything else looks fine, however if you care at all about sound, I suggest getting some aftermarket fans for your CPU heatsink's radiator as the ones that come with the H100 get very loud at higher speeds, from what I've heard.
Nice build otherwise! Looking forward to some pictures!