My roomate dropped his Elan 7IIE from about a 3 feet up and the back popped open and the latch that holds it closed snapped.
Out of commission.
He got a Voightlander R3A to replace it, and as confident as he is about it, I doubt it would survive a much higher drop either.
I've bounced my HEXAR down a flight of stairs, dropped it in shallow water and various other unthinkables and the thing just keeps on truckin like the day it left the factory.
Same was true for my FT-1 (Until the battery contacts broke like they do in all those cameras...) and I'm sure the same would be true for most cameras of that level and vintage.
I'd agree with Mark about the Canon 1 series if you really want something durable with AF.