Monza,
I don't understand the first part. I have not been using the kit zoom. All the samples shown here were using manual focus lenses.
I tried to make some shots to illustrate what I thought were your questions but I felt that is pointless.
If you have the camera, it will be easier to walk you through it. It is simple
(hey, even I could do it from day 1!!
).
The shots through a Canon 50/0.95, wide open, should tell you something about focus accuracy, ease of focusing and the like. Equally illustrative would be the wide open shot of a fast moving person in a mini blizzard through a 135mm Hektor (the longest focal length lens from an M system).