Finally made the decision to buy the D800 which arrived yesterday. After a lot of thought on how I was going to use it, decided that I would normally have it set to DX mode. Whilst realising it would be similar to my D7000 in terms of mps in DX, I was hoping that I could use a higher ISO as standard and also be more successful at getting properly focused birds in flight shots - something I have not been particularly good at doing. I've attached a Lapwing photo taken this morning at ISO 1000 which has been cropped quite a bit. I also found that on AF-C, I am much more successful at getting sharp BIF shots than I was with the D7000 or the D300s. Very pleased with it so far.
Jon,
Well done on your purchase. Your going to be very happy when you see the detail with the 36 megs on your monitor.
I use the 1.2x crop mode a lot to get the extra 1 fps, and often the 1.5x crop.
You'll find it much easier to get bird-in-flight shots than with the D7000.
Neil.