I know the XA2 isn't a rangefinder but I love mine. I'm a volunteer firefighter, and the quest for the perfect "turnout gear cam" has sort of become an obsession for me. For the most part, the same stuff that makes for a good street cam works for me - moderately wide angle, wide apertures, large DOF, compact, not terribly expensive... Good quality glass but not so expensive that it'll break your heart if it drowns, crunches, gets its innards melted, or otherwise LODD's on me. (Work comes before pictures, and I'd toss the camera before going in, but it might get forgetten. I do try to get pics during training though.)
Probably the biggest unusual requirement for me is the ability to operate the camera wearing gloves. I still dearly want an XA (the XA 0) but the focus lever doesn't sound well suited for the coat pocket cam. The Hi-Matic 9 I recently got should work in auto exposure. It's a little large but it would still wrap up in a spare hood. The Bessa L and T sound interesting but I'm just finding out about them, still trying to sort them out.
I uploaded a pic taken with the XA2 to my gallery, not sure how to link to the gallery from here (but its the only one there). No tripod, no shutter release - I placed the camera on one of the other trucks, took the blunt tip of my pocketknife and delicately pressed the button. I'm not sure how long the XA can leave the shutter open, but it was a looong time, as it was a bit too dark to read standing beside the truck.