My recommendation is also the N80. I have run many rolls of film through it, B&W and slide/print film. It has a lot of capabilities that the others have posted and for traveling it's nice and light. It has an outstanding set of custom settings too. I've never had an F100 although I have heard a lot of cool things about it. You probably couldn't go wrong with either one but for portability and a lot of fun I like my N80. I just put a fresh roll of Neopan 400 B&W in it. Well, fresh may not be the word since I bought it at my local camera store at a reduced price because the "expiration date" had been reached. So it's not so fresh but it IS fresh out of my freezer and into the body. I tried my new Nikkor 70-200 VR just for fun without any film in it to see how it focuses, etc., wow, VERY smooth!!
Best of luck in your decision, you can't really go wrong!