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Hi there,
If grab'n'go is the thought, I wouldn't be going the "aperture rules" path quite so quickly. Achieving thermal equilibrium is near impossible in winter near Canberra. Even with the fan going for hours the little amoebas never leave the off-focus view. I have the 10" and the views are good but it never gets to that non-shimmery view of the moon (for example). I don't know how much thermal balance you need to achieve up there (warming rather than cooling), but maybe the refractor is worth a closer look, or the 6" reflector for a quicker clear view. I harp on it a bit because it's one of the things I wished I was warned about before going the path of "aperture is all that matters". Besides, you'll get plenty of non grab'n'go with the 16" later.
Cheers
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