G1 is great tool, also for digiscoping - I sold all of my EOS cameras and lenses (to much weight
). Currently I'm getting better results with P6000 but I think because I know this camera and settings very well. I have G1 only for about one month and I didn't had chance to use it. I still think that I made right choise buying it for digiscoping (rotatable LCD is unbeatable), but I must get chance to know it better -I have felling that it will produce better pictures than P6000. It is a lot faster in autofocusing than Nikon and with the remote (only cable version) you can take more than one photo at once.
My opinion - go for it, but you'll have to study it a little bit to get great results. You can see robin in my gallery which was taken with G1 and Kowa TSN-PZ (G1 with adapter direct on scope - manual focusing).