G'day david & welcome to the forum mate!
Out of those 2 choice's, I would have to say the gs-600 would be the one to go for. It's of fairly short focal length = nice wide views, but also harder to collimate the optics. I think the tripod it sits on could be a bit rickety. I recommend some collimating tools as well if you go for the gs-600.
Suggestions from other forum members more knowledgeable than me in this area may be needed though.
