I'd check out the article
Astrophotography with a Dob to show you what you might be seeing.
The reason most people will point to the dob is, bigger meaning more light and able to see more, value, better as a first scope and better for viewing.
I would avoid going for one of the scopes on an eq mount for now as if you do look at going further down the road, the mount is something that you will want to spend at least 50% of your budget on.
I am in the process of saving for a Heq5pro as i am going down the road you might be on in a few months lol