Welcome! Seeing your choice of equipment I am assuming that you are primarily interested in astrophotography. If so then your choice would be a sound one. The Megrez would be rock solid on the G8. But if you are a visual observer might I suggest one of the GSO dobs (10"f/5 or 12"f/5). Those are the best bang for the buck. And do keep us updated on your observing chairs
Darren