Got my paws on a G12 at Jessops yesterday. It was charged up and I managed to have a good go with it. It was very impressive; the only thing wrong was the security leash on it...
I managed to win a G9 off Fleabay last night.
I can only agree (even though the OP has already made his move). I've a TZ7 which I use regularly for work as well as home. Although looking at the spec for the G12, it seems to be aimed slightly upmarket of the DMCs.
The G3 is not a DSLR, but a 'mirrorless interchangeable lens camera'. The EVF does not show exactly what the lens sees like a DSLR's optical viewfinder. Still a decent camera, though, and having had a play with one I think it would be a good substitute for a DSLR in many circumstances, particularly because its size makes it much more portable.
I have a Canon G12, which I bought to replace a Nikon P5100, and it's superb.
The Fuji X100 is an absolute beauty. Costs the same as semi/pro dslr but if you had the cash I'd highly recommend it, even just for the traditional viewfinder, ultrasilent shooting and massive true to 50mm sensor. ill be picking one up to fill in for when my 60D is too intrusive!