That is a lot of telescope, a 10" dob! Magnificent upgrade from your 130mm. Should proove easier to handle too compared to the equatorial mount you've got. I have a 10" dob too, my first DIY project. I've still got it, and love using it.
I promise that your first view of Omega Centauri through the 10" will leave you gasping and you won't look back.
GSO makes very, very good optics for mass produced scopes. I wouldn't be concerned that way. Nothing to sneeze at.
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