I'm not sure if the camera in today's technology, is still something worth considering.
I bought one off a friend as a backup camera - he had beat up the base of it a little bit but it only had 38,000 actuations. I love it - and i don't feel it is out of date at all, the buffer could be better as you get exactly 2 seconds of burst at 9 frames/sec. before it has to slow down, but its good enough for most situations. I really liked the D700 control layout and the D3 has the same layout - so that is a plus too. The sensor was so good image quality wise that I was able to upsample to a 36inch wide print and it looks great - not as much detail as the D800 obviously but still very acceptable. There is a lot about the D3 that I like better than the D4 and the opposite is also true, but I wouldn't hesitate to use the D3 in any situation to this day and I don't think that will change anytime soon. The D3s is a little better but used ones are almost as much as a used D4 so to me the D3 is a no brainer as a second body. Awesome camera Glenn you would love it - and it feels good in your hand. This is ISO 12,800 on the D3 - exported at full resolution with some noise reduction before the image was resized. I think it is really acceptable - the bokeh noise isn't as smooth as the D4, but you only notice it at 100%.
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Thanks for the nice image sample at high ISO of the D3 Billy.
There are several options that I am still tinkering, a D3 at sub $2k, D3s @ $3,800, D800E @ $2,500 and a Df @ $2800.
Things that I am considering is the frequency on how often or less often I shoot, studio work, and general photojournalism type of pictures.
I am also considering the Sony A7 and A7r full frame cameras but their limited lens selection is not a starter for me. Sony is definitely heading in the right direction but they are not there yet just like Fujifilm.
Here is a link that a friend sent to me. High ISO comparison between the Df and Sony A7 at ISO 12,800 if you are interested. The Df sensor (D4) is definitely amazing IMO which is why the Df is a good "augment" to our cameras.
ISO 12,800 Test – Nikon Df vs Sony A7 – Zero Noise Reduction and Low Light | STEVE HUFF PHOTOS