Nikon put what could be a very useful feature for me on the 300S and then ruined it by flopping the mirror for no reason. I primarily shoot bracketed exposures on a tripod where using the rear LCD would be very useful. I need the exposures to be taken rapidly for HDR without the mirror vibration.
Considering the much higher IQ of the Fuji x bodies vs the D300S, I'm very tempted to make the switch. Too bad nobody is in the business of hacking Nikon firmware. That is a fix that I'd pay for.