^^ that's almost like the Toyota commercials that tell you to drive their cars because your next door neighbors do it.
What's your primary need that you cannot fulfill at the moment? Is it high ISO clarity, or is it wanting larger format, depth of field control - i.e shallower where needed? Do you print? and do you print big, or wish to? Are you lacking resolution? (and I mean resolution, not just pixel count)
Well some of y'all will concur, I decided to wait on full frame and buy better glass. I went with the Tamron 24-70 lens and the Tamron 70-200 lens, instead of buying the Nikon 24-70 lens and the D610. I finally decided on better glass and learn more about my camera and techniques, actually work on being a better photographer and not some one with better equipment. I saw the video of the Sony A7 shooting up to 400,000 ISO, I wonder when this technology will make it to the Nikon side, since Nikon uses the Sony sensors. If this is coming within the next year or two, I might wait and buy the full frame then.
Tamron 24-700mm and 70-200mm are very good glass, I preffered the Nikon 24-70mm but thats me, Modern Tamron lenses are very good. Even if Nikon would get the A7s sensor I wouldnt get it, 12MP is simply not enough for me, I have Canon G15 as my second body and I hardly can crop its files. Nope for me its minimum 24MP