Hi-matic 9 is described as very good camera, and it has usable "easy flash" system, probably it's worth reading on it, unfortunately I haven't used it.
As charjohncarter says, leaf shutter cameras are good not only indoor but also in bright days outdoors. Lynx 5000 with 1/1000 top speed can do with flash what SLR (at least, those old ones) can not.