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How about "non-existing" :D Asus Rampage IV Gene - mATX with LGA 2011 supporting Xeons E5 V2 (and NVMe too).
As of today Microcenter have 1950X for $699.99 and 1900X for $349.99.
So that is a question: 2700X for $329.99 or 1900X for $20.00 more?
If you can find E5-2673 v2, it is a 2667 v2 refresh @ 110W