I have both the MX and the ME-Super with winders, which I find makes the camera fit my not so large hands better. Wonderful picture takers, although why Pentax omitted a depth of field preview on the ME I'll never know. Same reason they omitted an AE lock on the LX, which otherwise is essentially perfect.
I also have an Olympus OM-10 with winder, which for whatever reason doesn't feel as good in the hands as the Pentax. Something to do with the contours of the winder, I think.