They are both great cameras, I have owned both. Remember, a camera is just a lightbox, having a more expensive camera won't necessarily make the photo quality better.
A quality lens however, will make the quality better. I would much rather have an inexpensive camera body and a good lens, than an expensive camera body and a cheap lens.
If you can afford the F100, great! But make sure you can also invest a good Nikkor lens to go with the F100, otherwise the purchase would just be a waste.
Good luck and happy shooting!
To most people, the sky is the limit. To those who love aviation, the sky is home