I once accidentally dropped a Canon A1 from the top shelf of a closet onto a hardwood floor. Didn't even scratch it the prism housing. I'd always thought it was an all metal camera and was surprised to find that it, the AE-1's, and other Canon FD line had a plastic top on them. Not sure about the F1. These cameras have held up so well that to this day I can't tell they're plastic whenever I see one. Having said that, I prefer an all metal camera. The Leicaflex SL that I bought from Erik on the forum here (thanks!) is really heavy, but it just has a great feel to it. Love that camera.
Like others here, I have a Nikon N6006 and love it, and the F80 I had was even better. Wonderful rubber covering, and the quietest shutter I've ever heard in an SLR. If it wasn't for the somewhat small and dim viewfinder I would have gone for one instead of the N6006.
Brian, I just now saw your post. I don't want to go off thread, but yep, I think the Leicas are that much better. If you shoot the Leica SLR's, the optics can actually cost LESS than Nikons. I'll PM you and send you photos if you wish. Steve.