I certainly go along with the 20mm, it's a cracker. At the moment my leanings are towards the Zuiko f2 wide angle zoom, the 7-14mm seems great but slow and at 7mm a little OTT. But for me the viewfinder problem must be resolved as a first priority, either seperate optical finders such as Voigtlander or the EVF. This viewfinder problem will sort out whether I go for dedicated lenses or not, if it is usable then I shall go for prime third party lenses ( 20mm excepted) but if not I shall go for seperate viewfinders with totally compatible lenses and let the camera take care of the technical bits.
Longer lenses than 45mm ( 90mm in FF terms) have no interest, never thought longer worked on an M so why change
In fact the kit zoom would be a great choice if only it were faster and I must admit " kit" turns me off............any owners like to comment?
Using seperate finders I would match the inscribed focal lengths denoted on the lens barrel to for instance four optical finders, in fact using the lens as a 4 focal length optic rather than one that is variable between two fixed points.
Incidentally in Leeds the sun is shining brightly so I tried the GF1 out in the garden and........................the LCD sucks.
Hence my concern with viewfinders.
Brian