Focus is something I really need tracking fast moving aeroplanes. The D2X does the job very well (1.01 firmware) but I use one only focus point. Having 51 point means greater flexibility and would be advantageous for portraiture and still life.
Thanks for the summary comment 'better than D200 equal to D2X' means I'll be very happy for the foreseeable future using my D2X in its fourth season, hopefully a fifth and beyond.
Glad you are enjoying your new toy
