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From you list I would go for the 8" dob - best bang for your buck.
Its already been said but you could add a heavy GEM to it later if the astrophotography bug bites but then you would have time to save for that later. If you want tracking later and stay a visual observer then an equatorial platform is the go, I can track at 400x with mine for many minutes at a time.
The only essential extra you need is a cheshire eyepiece for collimation. Another "essential" would be a Telrad and then you would be set to go for a LONG time.
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