Just FYI, I myself just ordered an entire Performance Rig-build's worth of components on Monday, virtually the whole enchilada's worth of parts. It was around $1750's worth of pieces and I don't just have it laying around, it's a serious and significant investment for me.
I went with the i7 4790K and built around it - for a very good and specific set of reasons. To upgrade to the 5820 it would be a $300 minimum increase ... for the more expensive processor, more expensive DDR4 , and more expensive motherboard. Now some might think, oh well you're a fool , should have spent that $300!!!
Well I have two questions to pose that show, in my humble opinion, the logical fallacies associated with the upgrade-
1) How much money constitutes "Oh you should just spend it!!! Upgrade!! It's only $XYZ more!!! " and for that matter, where exactly does it come from unless you're independently wealthy and/or able to spend whatever you want here [in which case, these questions would not even be posed, you'd already have just bought whatever you wanted at whatever price for whatever best available hardware you could get] ...
and 2) Where does it end? So $300 is okay to throw on and upgrade... is $450 okay too? How about $600? $750? $1000 more?
And do you go to Skylake then? Top of the line Extreme-editions? 6 and 8 core Intels?
Heck why not just build a workstation/server style build with dual 6-core Xeons, 32 GB RAM per CPU, and GTX 980i Titan SLIs... the sky is the limit!
I configured me a rig that is built on the i7 4790K and I am very proud of it, proud enough to talk about it and list it in my signature like the cool kids who do that sort of thing list theirs. IT is not the biggest ,baddest, fastest, or newest on the market, but it's darn good and particularly darned good enough, and sometimes that is exactly the right place to be.