hear hear .. excellent practical advice. My main reason for moving to D800 was for the FF on wide angle shots. I felt limited by the D300 when shooting down around 17mm since in effect is was more like 35mm.
Anyway ... we all have our own reasons ... my biggest concern is losing the FPS of the continuous shutter release of the D300 .. I had definitely gotten used to the 9 FPS of the D300 with the grip on ... now Ill be down to less than half of that. 5FPS with the grip.
Anyway .. my decision to go with the D800 was for 1. FF and 2. Video