For Canon FD (if you like heavier Cameras) I would recommend a heavily used F1 new. I got mine on ebay for 60 Euros as it had the a heavily dented AE Finder (AE screen display does not work anymore) and the Camera has some brass too.
But it is a great match needle camera with automatic options. you can take worn ones at it is very solid. If you can stand a little "professional used" look I much prefer it to the Ftb (no battery problem, 1/2000, bright laser matte viewfinder, rock solid, better shutter sound, modern Si Cell metering etc...)
It is really a great tool with extraoridinary bulid quality.! And the 1.4/50 is really great and cheap...

For a lighter camera I would recommend the Olympus OM2..., it is like a Leica SLR should have been...