I don't own one, but I've been considering a second LGA-2011 build, and am seriously considering the P9X79-E WS. I used to have a P9X79 WS and was pretty impressed with it.
How do you like your board? How mature is the BIOS?
...rightful liberty is unobstructed action according to our will within limits drawn around us by the equal rights of others. I do not add 'within the limits of the law,' because law is often but the tyrant's will, and always so when it violates the right of an individual. -- Thomas Jefferson