I currently have a D700 and I'm looking at an upgrade to a D4 or D800. With the D4S coming onto the market, I've noticed some decent low count D4's coming up so the cost differential between the D800 (new with battery grip as I prefer the grip on) and the D4 becomes negligible.
At this point I'm in two minds. I shoot a mix of kids and sports (not professionally) and I like the idea of a slightly faster focus system but I also like the idea of the 36MP although the thought of processing the files is a little scary.
I figure I can probably keep my D700 (if I need the higher frame rate) and have the D800 so I have the best of both worlds. The D4 also sounds great but I always have concerns about second hand gear.
Is anyone shooting much sports stuff with the D800? How do you find it?