Chrismnm: The M10 and the Panasonic 20mm are a great match - even though focussing is still not as fast as it could be, it's noticeably faster than with the PM1, and I've hardly missed a shot with *that* combo. With the M10 - it just clicks. Heads and shoulders above the previous setup, period.
IBIS is more than adequate - I can't compare 5-axis to 3-axis directly at this moment, but I simply can't imagine *needing* more than what the M10 has to offer. I'll test all this in-depth on a night shoot this week with the 20mm and 45mm (depending on the weather).
Last weekend, I shot (in bright sunlight) with the 20mm, the Olympus 12mm and the Sigma 60mm - everything nice and dandy even though I didn't do a particularily good job for the most part - which is none of the camera's fault. It was more a test run than anything else anyway since I needed to wrap my head and hands around the camera, but it was a very nice experience all the same. The camera handles great in almost every respect and is fast, fast, fast. As it went, I didn't find a good opportunity to test the 45mm in the end, so that's next on my list, together with the usage of the tilting touchscreen - even though I doubt I'll use that a lot; I simply like the EVF too much. But there's still a lot to explore and to get used to.
Anyhow and slightly OT, speaking of tele lenses, I think the Sigma 60mm is a really good lens. As it is, it's got just that little bit more reach I need sometimes, but I still prefer the more pleasing (but not sharper!) rendering of the 45mm - just. In good light, the 60mm is a very reliable performer - very fast, very good picture quality, hardly a glitch in sight. But of course, the Olympus 75mm is a class of its own, far superior, so if neither size nor price are an issue, it's the one to get. But I guess that's not news
M.