Of those listed, I have Contax T2, Hexar Silver, and Minilux. I'll rule out Leica Minilux first. It's got awkward control buttons (did any camera ever required so many times of button pushing for +/- EV and canceling flash, until maybe digital era...) and a tiny, under-spec viewfinder.
Even worse, Minilux are known for potential "E02" problems... A lot of users have reported it. So be aware and google about this, if you are considering this camera. Well, you may begin to wonder why I bought one? I found a good bargain that's all... Alas, the Summarit lens is really great, but then those on my other cameras are no mediocre either...
Contax T2 is in many aspects similar to Minilux, but much more enjoyable as a whole, due to superior design. Ironically, it's the oldest design of all in OP's list, AFAIK.
When I don't need extreme compactness, I still like my Hexar Silver most.