If you want to go down the path of a GoTo SCT I would recommend Meade over Celestron because one thing I have heard resonate over the years is that the GoTo capabilities of the Meade (pointing accuracy and the like) are a lot better in the Meade variants than the Celestron. Meade also tend to be a bit cheaper.
I have owned several Meade SCTs and have never been anything but happy with how it performs. In saying that, for astrophotography I would go for a Celestron over a Meade, even having never used one. Once you get past all of the marketing mumbo jumbo on both sides, I personally get the feeling that Celestron optics have a slight edge over the Meade.
Another cheap way to go could be down the lines of an Orion GoTo Dob or getting a standard dob and installing Argo Navis.
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