I like my Pentax LX a lot but recently got an MX and secretly, when the LX can't hear and get jealous, I think I may at least sometimes enjoy shooting with the MX more. It's slightly smaller and lighter, noticeably quieter, and works at all speeds without batteries. About the only thing I wish was different on it would be speeds that go to 3200 or, better yet, 6400 as I occasionally use those film speeds with TMZ. OTOH, with an all manual camera it's very quick to meter at 1600 then give one or two stops less, so not the problem it would be with an automatic camera at all.