FYI, while the beta version of ACR will successfully convert D750 NEF files to DNG for use by Lightroom or Photoshop, the conversion may not be accurate, particularly at higher ISO's. I have view NEF files in Nikon ViewNX2 and they are distinctly different than their DNG counterparts. I realize that ViewNX2 will apply the Nikon camera profile, but even with a neutral profile the appearance is different.
I only raise this issue because if you apply edits in Lightroom to a DNG file, they may not be transferable "as is" to the NEF file once Lightroom and ACR come out of beta for the D750.
I'm please as I can be with the performance of my D750. High ISO noise is even lower than I've dealt with on the D610 an I can set Auto ISO to a max of 12800 and not even worry about it. Really a super camera.
11.400 ISO looks super good! 
