Looks like a good system, similar to my own, with a few differences.
The only part I'm unsure about is the 5820k due to its 28 lanes (PCI-e) and specifically what it might mean for VR support. Personally I went with 5930k in order to have the full 40 lanes for when or if I ever go SLI (GTX970), but honestly i'm still on the fence as to whether it was a good idea or not. Technically I think it was probably a mistake and I could have saved myself so cash, but emotionally it was probably right thing to do as otherwise i'd constantly be wondering if it were responsible for stuttering or performance issues
I've read several articles that clearly state 28 lanes with SLI (at least 2 GPU's) has NO impact on current games over 40 lanes, however I think these were testing average framerate and not looking at potential microstutters, they were not testing VR and of course we still don't know how nvidias VR Direct might work. My reasoning for going with a 5930k instead is that for a 2 GPU SLI set up on 5820k you'll have either x16/x8 or maybe even both x8/x8, that is affectively half the available bandwidth on one or both cards compared to a 5930k which can do (x16/x16). Should the game need to push more than x8 bandwidth data per any one frame ( at 75Hz I think from memory its about 40MB per frame) then clearly that card is going to to be waiting on data before it can render, which I assume would cause microstutters. I believe current SLI implementations alternate which card is rendering every frame, so that stutter might be nasty. I believe VR Direct is likely to use one GPU per eye (makes sense), in which case the stutter would likely reduce framerate for the period that the upload data exceeded the bandwidth.
However at present there is no data to back up this assertion and its probably not an easy thing to test. I would love to get some profiling data from a game like ED to see just how much bandwidth upload per frame is required. If its never above 40MB per frame than a 5820k will be fine regardless. In the end I went with the 5930k simply because I would have hated to have invested into a new system and find it problematic in the future. I should also point out the the PC is for work too, so having 40 lanes PCI-e also gives plenty of room for additional hardware that might need it.
Having said all that, my current experience of the game whilst not using the DK2 is that it stutters quite a bit anyway depending upon location, be it loading data, generating data, network issues etc. For example in supercruise in a new star system it frequently stutters every few frames even though the average framerate never drops below my monitor refresh rate (60Hz). I do not believe these stutters have anything to do with the PC system, but just how the game is loading/creating data. In which case it may be impossible to remove stuttering frames from the game (or any game for that matter), so the bandwidth issues I mention above may just not be worth worrying about.
