I ended up with an F100 after all. I got a great deal on one from a shop in Pa ($170 shipped with 14 day warranty, supposedly checked by a tech, shutter speeds confirmed, etc). Glad I went that route because I got to fondle an F100 and F4 side by side today. The F4 was nice, but the F100 was able to get a focus lock in situations that flummoxed the F4. Both were about the same in terms of focusing speed. The F4 would make a nice backup to the F100, but I think the F100 will make the better day to day user for me.
I checked both bodies out with a 70-210 zoom I have at home. Nice lens image-wise, but doesn't work well with my N80. It hunts and has a hard time locking on the subject in anything but bright light. It was a bit better on the F4 and a totally different lens on the F100.
Chris