I'd recommend the original Canonet, particularly if you're using an external meter
It has a full range of shutter speeds (1 - 1/500) unlike the QL17. Nice big viewfinder with parallax compensation and a decent 45mm F1.9 lens. The FSU stuff is just a bit too crude - I have a Zorki 1 and a Fed 5B. Horrible finders and uncomfortable to use.
So the Canonet is no Leica M Series, but it's easier to use than most and fun with the bottom wind. Available very cheaply too.