Sorry for the late reply since I have just returned from my holiday in Malaysia.
I brought my camera in Man-Shing in Hong Kong.
The F5 is a well balanced and solid built body, faster focusing speed, and many others advantages. But to me, it is too heavy especially when you carry two lenses for a trip longer than 1 week...For the D100, I really enjoy the fun of digital photography since I can view the images immediately after shooting and I think this can improve my photographic technique a lot.
There is still a long learning curve in front of me for the D100!