Totally forgot about the Mju II, probably because mine is in the horrible gold finish, the black Epic is a lot easier on the eyes. I'd agree with celery on this, it's probably the biggest bang for your buck. They are readily available for under US$50 and are capable of some really great shots.
The Hexar AF is a bit of a strange one. I divide my collection by camera type and this one hangs out with the rangefinder/classic camera group. I wouldn't have gotten it except that I came across this one in a limited edition and picked it up purely for collection, I've never actually used it. Way too big and cumbersome, and very limited in features to be a useful everyday cam.