/has no idea why you'd want to shoot in TIFF
I don't really care about the higher pixel count of the D7000 - the D300s is already doing silly numbers as far as I'm concerned. But doing side by side comparisons, the D7000 does seem to be picked out a bit more resolution, and it makes less of a meal of high ISO, as you say. It's a better sensor, but the D300s already has a very good sensor.
Cubby didn't know how to turn off sigs!