Late to the party here, but as a film and Nikon user, whose wife is also a film and Nikon user, my answer has two parts.
If you're not using a lot of legacy lenses, then it's hard to beat the F100. It will at least allow AI and later lenses, and it's great with AF lenses. My wife loves hers, and when they got cheap enough, she got a second one so she could put different film in them. She usually manually focuses and gets very long battery life with Lithium AA's as a result.
If you're using a lot of legacy lenses, as I tend to, the F4 seems pretty hard to beat. Anything that has an aperture ring on it, it can use, and it matrix meters with any of them. It's big and solid. Given its age, its autofocusing performance is surprisingly good. I thought I'd dislike the bulk of it after the svelte F3, but it's not hard to get used to.
Of course I may be biased, because I got a perfectly working nasty looking one with some non-disabling LCD bleed and lots of wear and tear for under a hundred bucks from a dealer I trust. I was quite happy with the F3 and a handful of F's, but could not resist this one, especially when I found it has an eyepiece diopter, something I increasingly need. I also usually manually focus, since I have only one AF lens in my arsenal, and the alkaline batteries that were in the MB-21 when I got it over a year ago are still going. Oh, and the placement of the second shutter button for vertical shooting is super.