Although I've always favoured Nikon I bought 5 (count 'em) Canon SLRs in 2010. The reason being that FD glass won't fit DSLRs or movie cameras (easily) and is much cheaper than later Nikon or Canon offerings.
The AV-1 is an overlooked camera, offers sufficient manual exposure compensation on an aperture priority body and comes cheap. The A-1 is a multi-mode analogue beast but great fun and the FTb is tough little all-manual nut. The F-1 is a lovely camera but good examples have climbed into collector prices and there's a lot of thrashed ex-pro bodies around. If I had to choose I suspect the FTb is the camera most likely to make the 22nd century intact.