Hard choice between Nikon F and Canon F-1. I think the F-1 is more user friendly in a purely practical sense, but the F is pure beauty in terms of aesthetics and construction quality, plus it has more historical value, being the heart of the first professional SLR system. It's effect not only on photography, but on the way the world takes pictures, and who takes them, was enormous. I think if I used an in-camera meter more, I would choose the F-1 on a practical level, because I highly prefer it's meter. But since I don't, I pick the F.