Dazz, I don't use AF at all for 95% of my work. But then again, I don't use SFDSLR. When I do use a SFDSLR, then I do autofocus, just because it is too hard to MF with the lenses that i use and those type of cameras. MF is much quicker and more accurate with a rangefinder, so that's what i use for all of my wedding work. i only zone focus in certain situations, and typically when i'm at f1.4 or thereabouts. i think that autofocus cameras get you into the mode of pin point focusing, where in reality, zone focusing is all you ever need. the example i described above for the wedding is more of a trap focus technique.
AK, i recently tried the d3, 1dsMK4, and the a900 side by side, and the sony did have a better VF. it wasn't something that we were looking for, but it was that apparant that we both commented on it.