G3 vs G2
I had the G2 and the G3 at the same time and finally ended up parting with the G2. But two things I really liked about the G2 that the G3 does not have and that I miss, were the larger grip of the G2, it was ergonomically a much better fit for my right hand, and the auto switching of the EVF and the LCD.
However overall the G3 is for me a better camera - YMMV. I could be happy with either one, though...most of the time I can't tell much if any difference between G2 and G3 pictures, I have some really good ones from both.