I can't comment on the G10 but I use the G9 in work quite a bit and the IQ is more than adequate although not DSLR standards. But you should try to stick to as low an ISO as possible. Plus you can take video with it - very useful in situations like the US Air flight! The G9 is built like a tank too. Looking at the G10 spec, I would miss the wider angle offered by the G9.