I too found the X100 to be rather light in the hand, but with the leather case I had on the camera it balanced fairly well.
I too had one of the Fuji rangefinders (The GW670III) which was totally plastic feeling but had an outstanding lens on there and produced amazing negatives. However, it was somewhat distracting that such a physically large camera was so light weight. I couldn\'t get over it.
I\'d have to handle the XP1 before I make any conclusions.
