Upload & Sell: Off
You're right that the 1Ds II has great IQ but for what I want with the BIF I think the1D IIn would be better for the crop sensor or the 1D III now that I've been straightened out on the AF. Still scratching my head as to where I came up with the 19pt AF on the III. I've probably gone over that chart 5 or 6 times.
I had a 1D Mark II and a 1D Mark III. I loved using both of them. Both were great cameras for their time, and both are still capable of taking great images. I thought that the 1D Mark III was a nice step up from the 1D Mark II in a number of ways. Now, though, especially the 1D Mark II (or 1D Mark II N) is starting to show its age compared to more recent cameras.
While either the 1D Mark II or 1D Mark III could still be an excellent camera for shooting action, neither would be close to my first choice for shooting BIF. With only 8 MP for the 1D Mark II and 10 MP for the 1D Mark III, you are going to need to be very close to your subjects, and there just isn't much room for cropping. For me as primarily a wildlife shooter, the two biggest benefit to my shooting from the many camera upgrades that I've done over the last decade came from the upgrades that I made to the 1D Mark IV and the 7D. With both of those cameras, the boosts in the MP count gave me the cropping room that I had always wanted, and, with the 7D in particular, the pixel density especially gave me both that cropping room and also the ability to be more mobile by being able to get significant reach without having to use a lens that weighs 8 pounds or more.