The Hexar is a great camera and worth your condiseration. I would caution you that they are out of production and repair parts can be difficult to impossible to find. Additionally, there are only a few repair people who work on them.
I personally have had no problems with mine but have read posts by others who have. If you have not done so already check out
http://www.cameraquest.com/ and http://www.rangefinderforum.com/ for additional info.