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Hi Sean
The Dobsonian that you're referring to is only a type of mount, that is alt azimuth
Whilst there are tracking dob mounts like the skywatchers, they will cause images in the eyepiece to rotate.
For photography, you need an equatorial mount that has goto capabilities and supports an auto guider input for auto guiding, without which long exposures are very difficult
As for what goes on the mount, it could be a reflector or a refractor
The ed80 is a very good refractor that keeps your weight low, so you could go with a mount like the heq5 pro
If you go with a reflector any more than 8inches mirror dia, you'll need a sturdier mount with a higher payload like the eq6
It all starts adding up
I'd suggest reading throug some of the threads here with equipment recommendations and that'll give you a good idea of what's involved
It also depends on your budget. What are you looking at spending?
Again, the Dobsonian is an alt az mount, mostly used for visual observation
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