I bought an F4s last year and I'm still getting acquainted with it. I like its ergonomics a lot. They are so good, I don't mind the weight at all. And I also appreciate very much that Nikon chose to incorporate all the controls in knobs and switches and levers. Honestly, I've never much been a fan of having to figure out how something works with LCD screens and button controls. I've found the F4 to be a nice camera for general photography, but in an area that is something of a specialty of mine -- motorsports . . . and airshows as well -- its AF abilities are woefully inadequate. At a recent airshow I became so frustrated with its focus tracking "ability" that I finally switched it off and shot the rest of the event in manual focus mode. Which is the way I got started doing it and shot races and airshows for years, using MF gear.
In this one respect, the F5 is a vast improvement over the F4. Its AF abilities are simply superb and are light years beyond the F4. So one of these days, I'd like to add an F5 to the arsenal as well. But I'll keep the F4 because of its great backward compatibility and because of all those knobs and levers and switches.
The N80 was mentioned a couplee of times. I own one of these as well and I simply love it. It's light and quiet, focuses very quickly, its built in winder has an adequate amount of speed. Really it's a great AF film camera and was indeed Nikon's last "prosumer" 35mm camera before switching over to digital with the exception of a couple of models.