the viewfinder is actually not bad and you can use the Leica finders as well. I saw a group of photographers of which several had GF-1's
and they all had different finders and lenses. but the one thing they all said was the camera is phenominal as to picture quality, as has been my finding, even with the stock 14-42.
You are making me want to see if it, the stock finder, can be manually zoomed, works with the adapters...
Finder not too expensive either.