Wow, some great advice, thankyou guys!
Yeah, I've always had my mind set on a G11 but thought a bigger scope would be better. BUT, I also dont want to have to be buying little bits and pieces just to get halfway to where I want to go ie. coma corrector (as mentioned), low profile focuser etc, so I'm glad I asked about the newts! Scratch that idea for the moment.
I'll invest in a guidescope/camera and try some shots through my C8 for now while I contemplate a refractor.
Now, does anyone know of a cheaper price ($4800) for a new G11?
Thanks again everyone.