>Quote>I'd like to get better low light performance. > Rumor has it that the "D400" will have ISO 6400. >That's only one stop more than the D300s.
The D200 only went to 1600 before the "H" levels. That means 2 stops if the D400 goes to 6400, only by changing teh body and keeping everything else the same. Same lenses, same everything. Of course, if teh D400 never materializes, all bets are off.