narsuitus
Well-known
Fuji GW670 III with 90mm f/3.5 fixed lens (see middle rangefinder)
(also known as the Texas Leica)
1) Produces high quality 6x7cm images on 120 medium format roll film
2) Dependable battery-independent manual/mechanical operations
3) Reasonable price
If this thread is limited only to 35mm rangefinders, then my vote is for the Canon.
Canon Canonet QL17 G-III with 40mm f/1.7 fixed lens (see rangefinder on right)
(also known as the poor man's Leica)
1) Fast high quality lens
2) Dependable battery-independent manual/mechanical operations (batteries needed only for light meter)
3) Reasonable price
Rangefinders by Narsuitus, on Flickr