thank you fro the responses so far.

A G1/G2 + 21mm + viewfinder is probably going to be cheaper than the M equivalent. However, I'm not sure if the difference is really that much to warrant another mount.

If I were attracted to the G because of the camera, then there would be more sense in my decision. My only reason for turning G is for the sake of economy but I think spending a bit more is going to give me more mileage in the long run.

Quick question. Anyone have a size comparson between these two lenses? Or the size of the G1/G2 + 21mm f2.8 + hood compared to an M + 21mm f2.8 + hood. The 21mm G lens look smaller than the ZM lens. This matters to me, but not that much.